Here's my Tippmann 98 custom. Below are my following upgrades and mods:
Tippmann Expansion Chamber
Polished Internals
Pro seal bolt and powertube
Starfire bolt
Tippmann Response Trigger
Double Trigger
Evil Grips
Rocket Cock 2
Drop forward
8 inch Lapco Bigshot Bead Blasted Barrel
Empire Reloader Hopper
CrossFire Nitro Tank 68cubic 3000psi w/Dye tank cover
Here's a pic:
Tippmann 98 Custom