Cooper RMA 100w PSMH

I picked this up recently with the intention of pairing it with my Revere gumball optical assembly. Unfortunately the tight internal layout and the design of the housing meant that a gumball optical wouldn't fit. There's a plastic terminal block and a pair of thickened bosses that prevents it from fitting. The lamp is a Philips 100w CMH, the only 100w CMH lamp I have with a mogul base. It's a enclosed rated lamp so I did have to change the original lampholder with a standard one. If the Revere gumball fit that would have been fine. Anyway I'll probably keep this in storage until I find a optical for it that fits.