RE: H9 1.20 CAP 232, SAITO 150 or 180?
If you do a search you will find lots of info on this plane here on RCU... Bottom line is most are very happy with the 1.80... With the 1.80 it will likely come out a little tail heavy so don't start out tail mounting the elevator servos. Wait to figure out where to put the servos until you know where the CG is going to end up...