Well mine are all put together now - they sound absolutely brilliant (love the extra room in the soundstage), but, the GS1000 pads seem to move around a fair bit. I think the distancer lip is a bit too small. Overall, extremely, extremely impressed. Turned a great pair of cans into my new...

Where are these drill holes located? Sorry if I've missed something, but the diagram just has one point - I assume they're evenly spaced around the distancer?

That's awesome to hear. I'm thinking I might go that route then.   Also, what's meant by 3 drillings à 1,5mm in the original post?

If you don't mind me asking (since I assume you ended up getting them from that website), how was the build quality? Do you think with an altered CAD drawing ordering from that website would be alright?