Yes, you,ve given me a few things to consider.
The Quadra exhaust does come out the rear of the cylinder, 1 1/8" away from the firewall.
Even if I went through the firewall, I'd run into the wing.
I like the plane, flies very well and the big 4 blade prop is very cool.
Not fast of course, but it is just a good flier.
Can't believe how much static thrust that 4 blade prop puts out.
Doesn't translate to speed though, too bad.
Are the four blade prop blades hard to come by?
I only have the one set.