I have the YS 1.10 in mine. Pulled the firewall right out of the front of the fuse. And yes, I did reinforce the firewall. It happened right on final about 1 foot off the ground. I was flaring and the whole plane dropped. It spread the landing gear, but that was the worst of it. The break off the firewall was a clean break, so it was an easy fix.
I also have VERY fast coreless motor servos. This biplane is amazing!