okay, so, after some r and d, dont put 4s lipo on your mgm 120 if you have a cooling fan wired to your reciever. after a wasted fm reciever, fans, and a few curse words, i found out that my bec no longer worked after plugging in all that power.
could have read the instructions a little more but instructions are for wimps. haha. luckily, the controller still works flawlessly. just wanted to let people know my mistake so they wont make it again. cheers.