Is my JR screwed?
The reason JR is different from everybody (and vice versa) is because JR wants you to use all JR equipment, not to go buy a competitor's equipment.
For servos, isn't it ironic that JR servos plug into Futaba, but Futaba servos don't fit into JR? There's no irony. It's a genius marketing ploy of JR so that others with non-JR equipmant can buy their stuff.
JR has a bunch of geniuses workin for them