Problem w/ Malkoff and SF 618 shotgun light

I recently bought a Malkoff M60F to upgrade my SF 618 on shotty. The problem was that the inner diameter of body wasn't wide enough or didn't have the correct taper to allow the M60 to sit deep enough for the spring to contact the batteries. I ended up wrapping the M60 in 1500 grit wet/dry sandpaper to ream out the inside of the body. The bottom of the M60 still won't fully seat down on the lip inside the forward portion of the body, but I was able to stretch the spring slightly so that it will contact the batteries and turn on. Much better than the P61 that was in there.

Anybody else run into this?

cold

Check out this thread (link), specifically post #20.