Plasma sputtering is hard. I have a good vacuum pump but it is still not in this class of stuff and while I’m good at electronics, that is a project that is beyond my skills experience scope. I’m maybe more capable of the surface stuff as I come from automotive class paint perfection. While nowhere near optical precision, I have defeated myself, in that I can apply any amount of tedium required to get the job right despite the emotional toll it takes to get results.