Looking good, and yes please updates along the way!!!
Love to see a project taking shape. ;D ;D ;D ;D
Just a word of warning (unfortunately too late for you but might help others) :(
Please, please dont use CLR to clean coffee equipment. Its not food safe so will need LOTS of washing to clean it away - but the really bad news is that it leaves a "taint" which will affect the brews and that is very, very hard to remove. :-/ :(
Just use citric acid (cheap, effective and totally safe to use and food safe as well). If you want to use what the "big boys" use then its diluted hydrochloric acid - but no need as citric acid works perfectly. :)