Excessive Speed???
My UCANDO has a Saito 1.80 in it. I LOVE this setup. It does all the normal stuff great, but goes as fast straight up as she can straight down. I have had no problems with her whatsoever.
She is turning a 16x10 prop and hovers three clicks above idle. I havent seen any sign of flutter, even when doing a shallow dive at full throttle. She climbs vertical into the clouds without any sign of slowing. As a matter of fact, she will go vertical straight out of sight and I continue until I cant hear the engine, then drop her back to idle, put her into a spin and wait for her to show up again.
The firewall has not shown any sign of coming loose...yet. The only issue I have is the short flight duration due to the fuel tank capacity. I get 8 minutes of goofing around. It would be closer to 5 if I spent more time at high throttle settings.
Inspite of the fact that she still has great low speed stability and lands like a feather, I have reinforced the landing gear in case I have to dead stick her in at some point...she is a bit nose heavy afterall.
I will snap a picture of my setup this afternoon.