RE: Made it harder than I had to
Welcome into the world of fixed wing.
You have made a great choice in the PT Trainer. I built my first plane (a PT40) last winter and have been flying it for about 6 weeks. I will agree with everyone here and say build it as a 4 channel and fly with ailerons. One thing to note, as mentioned above, build the B (sport) wing version. I built the A wing version and I am sorry about it. If I did it over again, I would build the B wing.
Other than that, it's an awesome kit. Once I had mine built exactly to plans, the plane balanced laterally and the CG was spot on - nothing needed to be added/moved. Pick it up on the CG points and the plane does not move.
Good luck. It's a fun plane to build and a fun plane to fly.