So I opened my P2V today to replace the 2 motors I cooked by improperly installing prop guards. I was surprised to see all of the available unused ports and female plug positions. For kicks, I plugged a servo into all of the 9 available outputs on the orange module I presume to be the receiver. I had hoped to be able to get a response from the 7th channel controller on the rear of the transmitter. Nope. No response from ANY transmitter inputs from any of these positions. I would love to know what the 4 outputs labeled "LED" were for. LED E, T, and R , and "EXP" U were 5.6 v and LED "A" was 1.3 v,F1 and all vacant "M" spaces were 5.6v, FWIW. Some other ports were also unused. One was labeled "fan". I think earlier P1models may have had fans. It appears to be a typical 3 pin fan connector as on a PC motherboard. Others were labeled "zenmuse" which we know what is for, but what are "exp", "can", and "exp" jacks for??? Lastly, there are 2 solder points labeled "temp", presumably for a temp sensor to control a fan?? I would love to have some insight into what these outputs are for. Lastly, I was hoping to be able to find a method of controlling a servo or electric switch from the 7th channel. I have installed the 7th channel lever switch on the rear of my transmitter for kicks, but would like to control something, perhaps like turning on and off my recently installed LED headlight. Any hints???