OK. I've posted the photos of my Epi Pro V before. I finally found a coworker who's good with metal fabrication to make me a few copies of a Steinberger Strap Hook (which they don't make anymore and are absolutely impossible to find - trust me, I looked for over a year) that I took off my Steiney Spirit bass to see if it would solve the neck dive issue I had playing the Pro V (works like a charm!). I've now added one onto my Epi Classic IV as well. Results - 1) if there are ANY balance or neck dive issues, this solves it in spades. 2) It shifts the body and thus the neck to the right about 3" making the reach out to the business end of the neck easier to reach with a more "normal" feel. Also it makes it easier to shift the bass onto my hip which is where I play it a lot anyway. I'll take it off and paint it black to make it more invisible but left it bare aluminum for now for illustration purposes.
I'm having a few more made just because, once I get them I'll take one and copy it out on graph paper so if anyone wanted to fabricate these for themselves they'll have the dimensions. Looks like to someone with even basic metalworking skills (which unfortunately I don't seem to possess...) could knock a bunch of these out relatively easy. FWIW these were made from (I believe) rigid 1/8" aluminum stock.
Some may consider it blasphemy to add something like this to a Bird but hey, it works. My Classic IV is now WAY more comfortable on my twice rebuilt left shoulder with much more even weight distribution. Same with the Pro V. I'll post the dimensional graph drawing ASAP, assuming I'm not breaking any rules here.
Also uploaded a grainy, blown up cell phone photo of myself with the Pro V (which I've also posted before) to illustrate where the front strap attachment is in reference to the body and neck. Kind of hard to see but I think you can see how much farther out off the body the front of the strap attaches as opposed to attaching on the back of the body/neck joint. You'll notice it comes out at the 12th fret, same as any bass built with an upper bout (i.e. 7ender).
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