I would like to fletch some cedar blanks. My question is, how do i know what spine to order without having my bow done. I know i'm probably going about it backwards but i can't work on bows in the small confinement of an apartment. The only help i can be is that i draw 65 lbs @ 29" on a custom kodiak t/d, and would like to end up with an osage self bow around the same draw weight, only non-centershot. I'm not sure if arrows are appropriate in the bowyers bench, but any input would be helpful nonetheless.

Your draw is going to be shorter with these selfbows so you should plan on that. But a good rule of thumb is to order the same spine weight as your selfbow draw weight but make your arrows 2-3" longer than your draw. Some adjustment in length, point weight, rear tapering and sanding may be in order but if you're shooting for a 65# selfbow then order some 65# spined shafts and go from there. ART

One "rule-of-thumb" I've used that has worked pretty good for me is drop the spine weight as you get away from center shot (for untapered shafts).  Ussually on laminated longbows I'll start 5 lbs. under spine for starters and adjust from there.