Just finished rebuilding my 2x Type Rs after a total strip down. I machined the rear motor bulkheads to accept the new IP5000 40C/50C packs. Took about 0.75-1mm off the side and the top. On assembling the top deck and screwing it down onto the rear bulkheads, you will need to use a #4 washer to space the screw up so it wouldn't get in contact with the LiPo. Have a look see and you will know what I am talking about.