Hello Bob.. just as a update on the old debate on PPM, my Futaba PPM Roo is still flying almost every weekend.
I started flying it with a R127DF in 99 and later changed it with a 8 channel R148DF PPM.. the R127DF went to a F3A plane that has a considerable amount of flying time too. No problems whatsoever, and all this in a very crowded club, with high tension power lines and cell phone towers nearby, etc.
Althought I used a PCM receivers in jets like the Superhotspot, I still believe that PPM is a good choice to fly jets.. specially in everyday beaters like the Roo.
Enrique