Review on 🔧 Accurate Precision Machinist: Introducing Anytime Tools 30 60 90 by Paul Andrews

I have had good luck with this supplier several times in the past and needed a set of these. I installed them on granite, ran some tests and found that the 45/45/90 spec was close enough for my purposes. However, I had a problem with 30-60-90 not being squared at 0.006. Basically I could put the 6thou probe between the top at both corners if it was next to a known good 1-2-3 block. . I also tested them with the B&S "Best Test" 0.0005 DTI and got the same results. This is significantly more (literally 20x) than the ±20 arcsec specification for working on these small corner blocks. Another small issue is that the holes in each of them are different sizes, so now there's a way to staple them together to create tricky corners. I know these are cheap blocks but I expected better than what I got. In this case, the quality assurance officer slept and the grinder sat at the grinding wheel. I emailed them but never got a reply. I've waited until now and Revane asked for a review so here it is.