Okay, quick question. I really love Magpul and I think the CTR is the coolest stock ever. I want to keep my gun clean, so I was thinking about selling my CTR and getting the airsoft version of the UBR that holds batteries. If I can though, I would rather just keep my CTR and use the lipo in the tube solution, but the question is, will I be fine using a 7.4 volt lipo in my stock G&G R4 Commando?