Originally Posted by
duanedr
Nice job! That looks great!
Check this page for the tap for the rear dropout adjusters:
Framebuilding.com
About half way down is the tap. It looks xtra long so, not sure if you could find one locally;
Art.33. M3 Tap for Rear Dropout Adjuster Holes £14.29 (£11.91 outside EU*)
Thanks for the Info source.