Wow!, first you flame him for the particular blocks he's making,
now you're ordering the copper for him, you do confuse me JD

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Micheal!, have you thought about making some GPU/NB blocks up while you have the milltime?. You could get away with using one base design for both, the mountings use different sized spacings though for GPU & NB, but these can be included in the tops or just use a piece of metal with slots in for a hold down...
Does anyone know a good place to order small peices of 110Cu in the UK?...