Anyone using the MRL solid roller lifters?

I have IMM's solid roller lifter versions in mine, they drop in with no grinding on my LA block. Pressurized oil on the roller same as MRL. I am sure they are the same as Mikes. Both are made by comp. I have a small solid roller cam 242@50 634 lift at the valve. Spring pressures are if I recall 200lbs closed & 510lbs open nothing too radical. So far they work well. I revvvv it regularly to 7000+ RPM it's a 410 stroker with a 180 hit of juice on it. The valve train does not miss a beat.