mihalich did you buy that 'schwinn 4 banger' rear shock and try it in the trunnion? Obviously it's a bollocks way to judge, but the picture *looks* like the threaded section is way too narrow.
edit: changed my mind it looks the same width as my rock shox coupe deluxe, I didn't realise there were different trunnions.
I bought a fox shock for a cannondale jekyll (also from CRC, also pretty cheap), hoping it would fit, and the size is just slightly wrong (will probably try to rethread the shock, or buy another trunnion mount and rethread that... yes that's probably a better option!)
Great bike, and you're doing some amazing work! Any plans to produce more of those parts? There's fewer and fewer places to get them...
