First of all, excellent work there. It's of great interest to me as i'll be attempting some custom made blocks in the summer hopefully.
Couple of questions.
1) the mica shim you used on the back of the GPU - where did you get it? did it come as a larger sheet? i've never been able to find any myself.
2) you mentioned using an end mill drill piece for a pillar drill, while i obviously appreciate a pillar drill is not designed for side cutting, have you ever tried this method yourself, i.e. using a pillar drill with milling piece? i dont have access to any milling equipment so all my blocks wil have to be made by hand, dremel and pillar drill.
cheers.
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