And of course my Bonza 1.5 25mm Cap came in as well - so, my final thoughts?
Although both mods perform exceptionally well, and they now come apart (entirely), I cannot justify the price tag on them. Upon dismantling them both COMPLETELY, for what they are, for how much they're asking for them, I can say without a doubt, they just aren't worth it. IMHO, any other 21700 mech would probably fare better in most instances.
They're both pure copper, they both hold 21700 batteries, and they both hit like freight trains. My biggest complaint has got to be the machining. On the Copper tube, the top cap was tightened beyond removal, and on the MO version, the button couldn't be dismantled. So they both went back to the manufacturer to be repaired / replaced. Both mods were able to be repaired and of course, returned. But why send a product out before ensuring their user serviceability? Not sure...
As much as I love RIG Mods, I can honestly say, I'm disheartened at this oversight and cannot recommend the Legacy Mod.
As for the Bonza topcap? I love it! granted it looks kind of wonky on top of a perfectly pitch black mech, the copper / black wrinkle just stands out now. And the topcap is a lot thicker than the base top cap that came with it. Meaning it adds a barrier of hit dissipation and resistance. Again, I love it. It's different for sure, as for the copper itself, I haven't tasted anything off about it, but as we all know (or should know by now) it needs maintenance. If taking your top cap off occasionally and wiping it down is too much, then don't use a copper top cap! As for me, I'm a maintenance junky so taking my RDA apart and washing it down is a common occurrence.