So far....
I decided to get a nitefinder
Removed the front dart holder/quiver
Removed the 'laz0r'. A gun of the accuracy and speed is not worthy of one so i decided not to wire up a real one or replace with a torch
Removed barrel
Removed AR
New barrel: faber-castell white board marker
Added another spring (only a very weak one)
Added teflon and wire to the piston head (improving the seal, i only need to place the dart half way in barrel, it gets pulled the rest of the way)
time taken: 30 mins (include video capture time)
Performance:
The gun is 11 meters away from wall. I wasn't paying much attention to where i was aiming and how i was holding the gun... i think all shots are angled... infact that last one hit the roof
Sorry about the S***house quality, that is my 6 year old bridging camera from nikon...