cM98, e-bolt kit, J&J 12 full tilt, Double trigger, Dropforward, Expansion chamber, 12 oz CO2, Ricochet2k hopper, alot of 2 9v batteries.
This is the best upgrade you can put into your c98. It improves your rate of fire greatly. You don't even need all the other modes. But it gives your the option to use them. My favorite is the turbo mode. Especially if you want to use your response mode for feilds that only allow semi. It goes from semi imediatly into response mode.
7 features but only 1 is mainly allowed of feilds (not bad because you'll be shooting fast enough on semi). The pools (circular units on the board to change ROF) are solf rubber and if your don't use a really small screw driver they shred. everything else is great. Batteries become a problem but i've used mine for playing on the weekends and and i haven't drained it yet. you'll probably drain your hoppers before you drain your guns. :)
SIMPLY PUT: IF YOU DON"T HAVE THIS YOUR MISSING OUT ON THE FULL EFECTS OF A TIPPMANN.