I have used the RCATS with great success, not a single glitch, but I am using the Hobbico head not the DuBro, the DUBro failed after a few starts, the Hobico works great.

I use a separate regulator for Rx and for CDI, on the CDI I use a Shullman regulator with a switch, it is actually lighter to my previous Duralite setup, I am going to try the Emcotec unit now, also the Powerbox Ignition sw, in any case I use a TunderPower 900mAh batt, it last for five flights before recharge and that leaves about 40% battery remaining.

Plankman, the way the 175 comes adjusted from the factory will get you going right out of the box, the engine will start getting richer after some 6 flights, then you will have to lean it, depending on many factors, the pump up to a 1/4 turn and the needle valve about the same.

As Adrian points out, the most difficult part is to recognize when the engine is lean or rich, watch for the smoke trail, the engine should smoke in all conditions, and I will sugest to stay in high oil content, it makes the engine run better and it is easier to set up using the smoke as reference.

The cooling is very important, use foam as papaone does on his cowling, but you can also use foam on the sides of the engines.

I secured my headcap with a ty-rap with the intake transfer tube and never had a single one fail, I install it very tight and it can not move, as per the instructions, there are now two two set screws which help improve the fit, anyway I still use the ty-rap.

Regards