Hi Paul ,
I have also converted my skydivers to Futaba , use 2 different rx's , a R608FS and a R617FS use them for more than a year with no problem .
Also use a to 2.4 converted 9Z transmitter .
All of my fail openings and dirt dives of the last year had the same cause ,messy folding ![:@]
Have one jumper on a Spektrum AR500 rx in combination with a DX7 .
Also with no problem .
My feeling is that the Futaba combination is faster recognized and responding faster.