I have the Veleno M3 tower module (neutral) and it's very nice. It puts out about the same amount of light as the MN11, but for 10x as long, and gives the option of running primary or rechargeable batteries with no change in brightness. FWIW, I applied a layer of Arctic Silver 5 thermal grease to the side of the tower, where it contacts the reflector to assist with heat transfer and I've never noticed a decrease in output after running it for a couple hours.
I've ordered a Malkoff MD60 and will see how it works in my M4, but I suspect it will be just as good. It has a wider brass tower, since the original bulb was wider, but it remains to be seen how well it disposes of the heat generated my the MC-E.
I've ordered a Malkoff MD60 and will see how it works in my M4, but I suspect it will be just as good. It has a wider brass tower, since the original bulb was wider, but it remains to be seen how well it disposes of the heat generated my the MC-E.