I want to know if the Reflex or AFPD would fit to my old JR X388s or it would be better to buy sim with game commander.

AFP Deluxe sure works good on my JR X347. Is the X388 a computer radio? With the X347 you can use all the programing and dual rates...ect. I am trying all sorts of mixes ...ect. Some FUN. Plus it does not cost anything to CRASH CRASH CRASH!!!!!

yes x388 is a computer radio

ok