LRP Quantum Report- While I haven't raced it again I am pretty confident that I found the problem and credit must go to Foams for diagnosing it first. It looks like it was the RX pack that was the culprit. I decided that I would simply put my new Quantum on the car to get ready for the next few big races starting next week. Well I also decided that the rx pack would go to. When I pulled it out one of the connections pretty much fell off and another one almost came off and the shrink was melted around one of the cells. I have two other packs made and had brand new cells to make another so I charged up one of the made up packs (about 2yrs old) and guess what? While the rx pack in the car was peaking around 9.3-9.7v the old pack only peaked around 8.5v. I then put the new pack together and charged it and it peaked at 8.4v. Not satisfied I decided to do a voltage drop comparison with the new Quantum vs. the one I have been using since Aug of last year. The new one had a voltage drop at the wire ends of 22.8mv and the used one came in at 22.8mv as well. I let it run for a little while to see if the resistance would increase and it didn't it actually dropped a little. Then I plugged back up the new one and it then registered at the same lowered resistiance. Both sounded powerful with the motor hooked up. My conclusion is that the ESC is fine and that since the rx pack was peaking 1v high and had a cell with melted shrink that the rx pack was done. With LRP's on 4cell the voltage is so low compared to six cell that when we get close to running out of energy in the main packs (going soft) then they told me that without the rx pack we pull the main pack down and loose runtime. At least this is what LRP told me yesterday. So Foams you thought it was the rx pack and I guess that it's been peaking for so long at that high voltage that I didn't realize it was on it's last leg. I got 4 months of a lot of running out of it so I guess that's ok. What do you think?