I've worked on a lot of markers in my time playing paintball. Any questions that you have and I can probably help you with it. I have also rebuilt tank regs (can pressure test them) as well as doing work on hoppers (Owned Revis, Halos, Prophecy, multiple Rotors).
Markers that I've owned/worked on
Alien
Alien 06 Independence (worked on, not owned)
Ariakon
Overlord (this was a fun shooter)
Bob Long
Rapper
Victory (one first gen, one SE 2nd gen)
G6R
Dangerous Power
Threshy (worked on, not owned)
G3
G4
Dye (not a huge fan, but I do want to try an nt)
DM8 (worked on, not owned)
DLX
Luxe (older and newer gens)
Evil
Omen 2.0 (this marker was so irritating)
Invert
Mini (multiples, gen 1 2 and 3)
Macdev
Clone (worked on, not owned)
Planet Eclipse
Ego 7
Ego 8 (worked on, not owned)
Sl8r
Ego 9
Ego 10
Ego 11
Geo + (worked on, not owned)
Geo2 (this gun was SEXY, I really want another)
Proto
07 Rail
07 SLG
Smart Parts
Ion
Epiphany
SP1
Tippman
Tippman 98, and 98c (bout 5 of them)
Bt-4 (egrip and ripclip)
Tm-7 (worked on, not owned)
Tm-15
Spyder
Many models, mostly worked on. Started out with an old spyder victor as my first marker, so I have quite a history with these blowbacks
System X
NME
WGP
Cockers all over the place, both pumpers and mechs. I can time them