OK... I give up...
You've avoided explaining your "use rebar to pull it back" recommendation a number of times. KingRay's already had it with suggestions and opinions here, and I certainly can't blame him for copping an attitude.
You avoided the 'Yes or No' answer, so we're even !
Guess I was so crabby about your not answering a direct question, I didn't even realize you were asking me what my opinion was. Seems I was pretty clear in all of my posts. I've said all along that if the sheets were nailed onto the trusses when the bow was in place, that I didn't agree you could pull and keep it in the right place. Clear 'nuff?
And FWIW... Never heard of welding up rebar & using turnbuckles to pull a wall like this. It'd be cables / come-a-longs and wood to hold it, IF it came to the right spot 'round here.
KR - I think everyone who posted was trying to help. Just different opinions on how.