ROG
you will like the OS 15s they run just fine. we use 'em a lot in SSC.
A couple of trick for em are :
seal the back plate with something like gasket sealer or teflon tape.
lock tite the screws. all of 'em
some guys score the throtle holder so if it bonks (combat birds do bonk a lot) it will break at the score.
OS 15 fp metal back plate cures some problems with the rough life of combat, you shouldn't need one though.
Sending you a pm