Oh very nice, great size and it looks strong, I love that it takes the 3XBE
It's a good thickness for the beam expander.
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The spiral groove may take a little getting used to but it looks good, you could on future units cut another groove the other way and make a diamond pattern kind of like this
dear,it have a copper heatsink inside,diameter is 20mm and 40mm long, designed it to be removable easily, this will be a multi-module build of me
Thank you for sweet word, RedCowboyand BowtieGuy