on a academy 1/72nd stuka tankbuster, whats with the canopy option? has four seperate sections and does not appear to be able to position in a open position, other canopy is one section........

What do you mean? That the sliding portion of the canopy don't fit over the other, like this?
http://www.hyperscale.com/galleries/2001/ju87bsm_1.htm

I tried to position in the open position with the canopy sections, it is possible, just ill fitting, probably not as sophisticated as some other model brands, thanks for your patience with me, I think I am finally ready to proceed with my new hobby

Hi Dave.
Welcome to Aeroscale!
Ive had instances,,( The Revell Hurricane comes to mind) where the canopy comes in seperate pieces for the option of posing it open but theres no way the canopy will fit in that position
Sounds like your Stuka comes somewhere in between.
If you really want to pose the canopy in the open position you might want to consider a vac form replacement.
Hope this helps.
Nige