Doing my bit for the forum's common knowledge -
Just had my gun back from Negative Airsoft and it is AMAZING. The AEG he has built for me is now in my hands and it is a completely different league compared to every other AEG I have owned (always too hot stock, spring needing clipping, never enough money for upgrades).
So YES, I highly, highly recommend Luke/Negative Airsoft. Absolute gent and a real gem of the UK airsoft community. His passion is evident and it shows in the care and attention he gives to every project, which he keeps you fully informed of throughout as mentioned above. He truly knows his stuff, and I'm almost convinced he is some kind of wizard.