My engine is brand new, have only ran it on a stand to get to know it a little(first gasser for me) I was almost buying that cmpro giles 202 myself. but went for a cheaper plane like the harrier 90, but then I changed my mind and will put my ys 110 on that one, so that`s why I got the edge 540 26cc as I thought it would be more suitable for my mvvs 26. I have only tached it on the menz s 18-6 wood and got 8600. After some research I found that this is normal rpm on that prop when piped. I will also try the menz s 18-8 when I get a hold of some. I also got some props with my edge(don`t remember the name) from peak, they were 18-6 also, but seemed a little narrower than the menz. I suspect they will give higher numbers on my tach. I want to stay with wooden props as apc`s in this size will be quite heavy and not provide the quickes spool up( prolly doesn`t matter in that giles though)