RE: Compatibility for a new radio
For the most part all servos and extensions are generic of today’s offerings... So you can inter-mix without issue. The only specific areas that one may experience problems with is utilizing buffered, amplified and reversing electronic wyes or extensions designed for "JR" or "Futaba" with other OEM equipment. So if you want to use a fancy boosted/amplified/reversing wye or extension utilize one designed for the radio system in use.
Hitec and Futaba products are backwards compatible; you'll not have any problems with this combination.