Not hard to do... Just be careful!!
Thanks to everyone for the tips and photos on doing this, big help
I did it on my 1992 MK III. took about 30-45mins.
With this newer model, yes the trigger pin had to be removed to get the mag disconnect / safety out. I can can confirm the trigger pin is
removed from right to left and
installed from left to right
Be careful when doing this.. if it doesn't move.. check your direction. Be mindful of punch, it can slip of the pin... Use good tape/cover to protect the frame...
Don't be an idiot like me and whack it the wrong way around..
I was trying to remove the pin left to right.. a few good whacks I thought the pin moved.. turns out the punch slipped scratching/ marring the frame

the tape I used to cover the pin/frame was some old black tape, which just slipped around from the blows, I didn't notice the marring until i removed the tape

Pics included, so others can learn form my mistakes ..
Flipped the gun a around and a few good whacks and good tape and support of the punch (put my fingers on ether side of it) and the pin was out.
followed some of the tips here on putting it all back to together, and done.

The trigger is now much lighter and more crisper.. diffidently better feel to it.
Now to test it on some bowling pins this weekend..
