I installed a 19 tooth top black gear and the rest of the black gear set from DDM in a CNC trans case and did the top hat mod to the PCSC to run the hostile gears for a buggy build. Got the IRC diff housing and his big bore shocks all around. Took the 1 inch extended hubs and machined .100 off the hex face that goes into rim pockets.......BUT I am now running the 180mm MCD buggy rims with GRP rubber and a set of losi 5 buggy pre glued and will NEVER look back to beadlocks again. By dumping a tooth in gearbox and slipper mod done the buggy handles like a dream and pushing the larger wheels is nothing now and rollout is much improved. The buggy has only the rx box and fuel tank left that is factory. Gizzmo did up a super mod for me and I did in my shop a full mod 990wt with gizzmo's SS high flow shaft kit with notched butterfly and CNC control arm .Played with the walbro master spring kit and found meter spring that gave me a pop off of 13psi and a reseat of 10psi and it now has way more clean carb punch and the primer bulb is always full with no air bubbles at WOT passes and starts with one pull when cold, Pretty good for no choke! . A booster pipe from the Detroit boys takes care of the fart gasses and a super freeflo R2C air element hooked to a bartolone 2 piece stack and carb bolts up to a RB heat sink manifold. Running Sunoco Surge race fuel and 927 oil at 18:1 the motor got a dyno run sheet of 8.97 HP. 18:1 mix gave us the most power as Gizzmo's said it would and the extra oil does make more BTUs and it shows. The Surge race fuel is also 100% E free and makes great power without ultra high octane and does not attack the lube package in the oil. All in all the chassis handles like a dream and goes like a raped rocket. I also have a red race rotor ignition system to try out but was told the plastic fans in kit does not move much air so I will try it in a OBR reed case motor and if it smokes the motor I will not feel bad for the loss. Going to dump some beer down my piehole and will add to the list as the build gets bigger, Have a good one!!!!!!!