A few thoughts. First off, full disclosure, I think Simmons is a deplorable human being.
That said, this is not about Kiss or personality disorders, but about building basses, so that's where the focus needs to stay.
The drawing you have, while great to work from, seems a bit out of scale, in particular, a little large. Not a criticism of THand's excellent work, just an observation. Just cutting and pasting pieces of the fretboards in several LoBue bass photos and then comparing those to cut/pastes of the danelectro neck on your diagram, I'd say the body could lose about 3/4" off the tail end, and the bouts need to come inboard by about 3/8" per side, overall making the body 3/4" less wide, in addition to losing a bit of dimension behind the bridge.
I think the fact that the LoBue bass went through so many incarnations is probably also factoring in here. The original was clearly a two piece bridge and the strings ran over the bridge, through the bridge cover to a tailpiece. At some point, this was changed to what appears to be a simple fender style bridge. This probably contributes to the odd looking dimension, especially when the extra pickup is added to the design.
I think the saddle location, as it is in the LoBue, is just a little forward of the alignment of the volume knob, so that may be one of the indicators for locating it.
The scale of that particular neck appears to be 14 13/16 to the 12th fret, rather than 14 7/8, so in effect, it's likely a 29 5/8" scale rather than 30. I've actually not fooled around much with Danelectro's so I'm not sure if this is accurate. It's possible your tape measure is off a little as well, I tend to use precision measuring devices myself for these kinds of things just to be sure. At any rate, if the G saddle is all the way forward (minus a couple of turns), then that should be in line with the measured witness point (in this case, apparently 29 5/8").
On a related note, I have actually not been able to find a reference to the actual scale length of the LoBue original, it's usually just referenced as "short scale" which is often 30" but might also have been 32" or shorter as well.
For what it's worth, this should be really cool...