as i said they don't have any markings the only real way to see if it is a 26cc is to measure the piston. my test sq were 23cc
the 23cc will have a 32mm piston
the 26cc will have a 34mm piston
measure from one side to the other
good to see you on oz large scale
I try to leave things along and not pull them apart if I don't have to "Passion Fingers" my mate will probley pull his apart before me so I will keep those piston sizes in the old memory.
I only just found this forum and the oz large scale one, great forums both.
Cheers,
Dave