Yes I have, sat down this afternoon and worked it out
Will do a guide on here as soon as I can find a bit of time...
quick guide to tough bit:
take out mag
take off right grip
take out tiny grub screw on frame under grip.
push barrel down on table to push it back about 3mm
press the mag release fully
at the same time pull down on the whole trigger unit, it will come down (do not grip safety at this point).
slide bolt and frame will now come apart
Great engineering, the only addition is the "locK" grub screw over the real item