I have a Q42 on a SIG Cap 231 EX . No pix but pretty much the same as Dave's but with a 3/32 aluminum plate on the back that bolts to the firewall with appropriate spacers. Fuel tank can be put pretty well anywhere as the pump in the carb keeps the engine happy. On the CG is the best place as the amount of fuel they can carry can shift the CG quite a bit.