aluminum

I'm in the doubt of which O.B. is better for a metal (pot or aluminum slide), I do not remember if I read it or if I saw it in a video where it mentions that the O.B. made of steel can damage or "eat" the slide being softer metal, then should I buy an O.B. made of aluminum? Here I have some...

Salutations friends. I’m relatively new here, but not an entire stranger. I’ve used this for information prior to purchasing my latest toy, the Well Mb03d which is the pro spec (correct me if I’m wrong). I’ve read millions of times that the sears and piston wear out rather quickly. I’ve sent...