AFAIK it is not "beta". Wiki say "Alumide is a material used in 3D printing consisting of nylon filled with aluminum dust, its name being a combination of the words aluminum and polyamide. Models are printed by sintering a tray of powder, layer by layer.[1] While it is much stiffer than other materials used in 3D printing, it can also withstand much higher thermal loads, maintaining its shape at temperatures that would cause thermoplastic compounds such as polylactic acid to become molten.[2]".
No I meant Gdeal labeled it "Beta" (when you click on it, it's in the title). I've had multiple people tell me that they love their Alumide printed mods (you being one of them), but "The Designer" (insert holy choirs of angles singing AhhhhaahhhhAahhhh) labeled it as such and I am a closet worrier.... and I think/type/talk too much.....so you add the two things together and you get posts like these.... and the one before it.