Very tidy! Excellent craftsmanship!
Maybe post up a link to your machine shop if they have an online presence. Looks like they really know what they're doing. We've got Front Panel Express here in the states, but not sure if they do work across the big water. In any case, CNC is certainly the way to go, adding a whole other level of professionalism.
Couple questions. Your rectifier? Unusual to see one with a nipple on top ... either that or I haven't been paying close enough attention.
Also, the industrial looking clamps on the can cap are nice ... source?
PS ... Everything but the PIOs should be fairly well broken in by now with minor changes as they burn in more. The PIOs can take up to 600 hours to break in completely, but sweeten up considerably at around 100 in my experience. Stock up on popcorn - you've got a whole lotta listening ahead!