Whoa
you did a great job considering you did it for the first time!!!! Except the block being of brass, everything else looks just GREAT!
Man, I'm glad you'll get that copper and keep the good work!
I'm not familiar with those thread measurements, can somebody explain them a little? What 1/2 NPT and 3/8 mean?
/edit/ and today looks like my lucky day, I found the shop with Allen bolts, bought 20 pcs M4!