Need some input on a hophornbeam pyramid bow

[Flinttim]

I cut a decent sized hophornbeam Sunday and one stave off one side of the log is very flat. No crown at all. I want to do a pyramid bow off that stave. I cut the stave to around 70" and done a rough out to help it dry. Got it now clamped on my caul so as to prevent twisting and such. Anyway, I've been reading TBB 4 about heat treating and mass performance. I know it can't be written in stone but can anyone give me some basic dimensions for hophornbeam in a pyramid bow, ie: thickness of limbs from the fades out and width of limbs at the fades out to the tips. Just something to get me in the ball park when it gets dry enough to work.Going for a 55# bow.About 65" long.