The two first pics were powder coated about two weeks ago maybe less. And the host pic is raw no coat just polished with Blue coral polish for rims . And I also use Mothers to they are two great polishes. Thank you guys for the feed back it really sets some guidelines in machine and finishing.
Enjoy the CU host they are a pain to machine and take time but well worth the outcome.
thanks buddy you purchased plenty of my hosts and sinks you know well ..
I like the copper host better of the two. I am just a fan of copper's thermal capacity. You will be recharging your batteries often using a boost driver with these high current LDs. I would consider using higher capacity batteries in the future. Panasonic makes an 18650 that is 3400 mAh and would work longer with these diodes.
I like the all copper variant as well - it looks really nice and probably performs best thermally.
I doubt it would make a significant difference making the exact same device from aluminium though: the limiting factor will still be heat exchange between host and ambient air, with the thermal conductivity of the material only be a marginal factor.
Black anodized aluminium may have a bit of an advantage there even, but i do like the look of copper/brass