Al I looked on Amazon for the mini mag LED up grade and found something better, maybe, lots of reviews.
Terra Lux TLE-5EX MINI STAR 2, extreme LED upgrade for mini mag aa, 140 lumen.
Centerfire
I've been seeing spots for a long time and I don't have a borescope!
Yeah, well I bought the LED upgrade at one of the local camping stores down here. Made a BIG difference, as the light is now bright white instead of a yellowy colour.
Cost AUD $16.00
I can tell you, way back a long time ago, I used a flush system with water soluble oil. Even running a paper towel into the chamber before poking the scope in, some of that light oil always creeps back. It's that oil that made the mirror flake off. It's not all gone, but about 1/3 is. Jerry Stiller once said he might make a stainless replacement mirror since those are so fragile, but I don't think he ever did.