Due to a theft I have a lone Zeagle ZX 2nd stage. It started out as a Zeagle DS4 1st with the ZX 2nd. I really enjoyed this set up, but would like to try the Apex and it's more reasonable pricing. Is threre any problem with mating this configuration: Apex DS4, Zeagle ZX primary 2nd , and Apex TX40 as back-up 2nd?