BenChiew
Flashlight Enthusiast
I use the M61 lens and head gasket that I bought from MK for my 2-cell with M61W. Works great!
Have a good look and you will see that your drop in is sitting deeper into the bezel. That will cut out a lot of your spill beam. Plus if you look into the drain/groove, you will see sharp edges that may contact your lens if you tighten it enough. The proper oring will avoid this.