Apparently the control surfaces don't want to work well with pWings. Trying to make either a replica of a North American X15 or a Bell X1 with no sucess.
Although you have to balance the number of control surfaces. If you have too many of them, you won't have any infiniglide effects. Also, both of my entries were piloted manually. Even Mechjeb can't pilot my crafts sometimes.
I was never able to use TT Wheels past 500 m/s without the axle almost touching the ground and the wheels clipping the fenders. I'm gonna look at those girders later.
After a few hours thinkering with wheels and debris and crashes, I was able to at least come up with two working(sorta) designs: Here's the Rolling Thunder: And here's the other: