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fEarful 12/6 kit : a total noob build diary

I very much doubt Leland would hesitate to remediate the problem... looks like a couple of modified braces would solve half the issue and be cheap to ship. That said, I would just drill pilot holes, slather the PL and drive a pair of screws in to hold the brace while clamping = 3 minutes of extra work.
You're forgetting filling the screw holes with auto body filler and sanding.

OP could go crazy with small blocks screwed onto the panels interior to align the baffle and proceed with clamps. The blocks would need to add up to less than the interior volume lost by shortening the braces.

I think it comes down to OP's penchant for cab building or other cabinetry foreseeable. A heap of clamps + biscuits vs wholesale screws or a just a couple of clamps and a lot less screws.
 
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Is it possible to rent clamps instead of buying?
Probably not, but you never can tell. Seems pretty unlikely. Among the disadvantages of using PL Premium is the long clamping time, but you really only need a couple if you are patient enough to do one joint at a time. And you don't need expensive ones...as previously mentioned, HF-quality is probably good enough.

This brings up something that is sometimes overlooked by people wanting to build their own stuff: do you already have the needed tools, or are you willing to invest in them? You need to factor that in to the equation when evaluating the cost of DIY.
 
And it's something that can quickly spiral up into the thousands, as anybody who has built a cab can attest.

But if a guy were to take his time and find some workarounds, the bare minimum needed would be - a drill; a jigsaw; quick clamps in (2) 6" and (2) 12"; multi-bit screwdriver; tape measure; speedsquare 8"; patience and planning.
 
Yeah, hitting exactly where you want in a side panel with a biscuit jointer isn’t that easy. When my slots are slightly off, I hit em again with the jointer. A slightly wide slot is better than no biscuit, IMHO.

I’d adjust the slots that need adjusting by removing some more material. If I had only a drill and a utility knife, I would do a bit of careful drilling and clear out the chunks with the knife.

Biscuit jointers are great with 3/4” materials and thicker. For our 1/2” Baltic birch, (12mm) it takes some adjusting with a jig to get the biscuit centered in the thickness of the panel. And it’s really easy to get a little off doing the cut into the side for the baffle biscuits.

Once you’ve adjusted the baffle biscuits, and everything fits, drill a few pilot holes and use small screws to hold things.

Double check to make sure the baffle is oriented correctly and facing the right way.

For a real brain twister, try a 12/6 cube from scratch.

View attachment 3834878
Don’t forget to reward yourself when you get it together. These are the cheap harbor freight clamps. If one ever slips, they’ll give me another. Notice all the marks.

Nice job sussing out the issue. Carpentry is all about really seeing what’s going on. Keep on keeping on!

I'm not sure what part the beer and booze play in this build..............but I am VERY INSPIRED!
 
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To the OP - You have the exploded view drawing. Did you physically measure every piece and compare them to the drawing? Curious..

I did exactly that. As a total noob I am extra cautious of making any mistakes. I measured every board and marked precisely the points and lines along which the other boards should line up according to the plans downloaded from greenboys site.

When it came to the wonky baffle biscuit routs, I triple checked my measurements, both from the back and front, unwilling to assume a total noob can second guess a pro. But the measurements held up. The baffle was clearly 1/8" too far back.

Everything is exactly to spec, except those routes. The fact that *all*the baffle biscuit routes are off by the same 1/8" suggests the tool used to route must have had an incorrect setting from the front edge for that pass.
 
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But if a guy were to take his time and find some workarounds, the bare minimum needed would be - a drill; a jigsaw; quick clamps in (2) 6" and (2) 12"; multi-bit screwdriver; tape measure; speedsquare 8"; patience and planning.
While I can imagine some work-arounds, I really believe you need a couple-a-three clamps with the clamping range to handle your largest clamping dimension.
 
So can screws alone negate the need for clamps?
If not , what is the fewest clamps I can get away with?

"You can never have too many clamps" might be true
But "too many" is out of my budget lol

Do hardware stores sell 90 degree clamping jigs?
I see plenty of DIY versions but that requires bigger tools than I have.
 
There are right-angle clamps, and there are jigs with which you use regular C-clamps. Either might be available at the local big-box...it's worth a look. Rockler and Woodcraft are real go-to resources for little trick stuff like this--they both have big on-line presences, but I can't imagine there's not a Woodcraft somewhere in the Metroplex. You can order online and pick up curbside at Woodcraft if you don't want to brave the pandemic.

If you have some way to securely hold panels at a right angle while you screw them together, you can probably get away without long clamps. I guess. I'm not completely sold on the concept of gluing un-cleated butt joints in 1/2" ply with a polyurethane construction adhesive in the first place, but hey...I guess that's just me. :(

Obviously you don't really need a jig-saw to assemble a flat pack...at least theoretically. It wouldn't have been the tool I would have chosen for the purpose, but sawing 1/8" off of those two braces to accommodate the misplaced biscuits would have made your life easier, IMO.