Roof beams help help

[hifiveohwaitshit]

Hey guys, I'm building my second 12' yurt from scratch and I'm having trouble getting my roof beams straight. I had this problem with the first one but I don't remember how I overcame it (that was over a year ago and there was alcohol involved.) Basically, my problem is that the roof beams are bending like boomerangs to fit into the kana. I tried twisting the tono to make it line up straight but it wouldn't budge. I'm racking my brain to figure out what I did last time.

Anyone else have this issue? Any tips or suggestions? I've just gotten the frame set up. There's no canvas yet. Please help thank you.