So after using my SMP for a second game day a few weeks back the data cable snapped and the FCU decided it would blow as well.
after some thinking i decided to change where it all does as the data cable is fragile and with constant bending it soon gives up but where the FCU is the battery must be due to the short cable between the two but not now.
I have placed my FCU back in the stock so it's safe and sound and now setup it won't need to be removed. and the battery is now in the grip. Some people thought this would be and is a pointless task for me to do but if it keeps my FCU safe and reduces wear on the data cable to practically nothing then to me it's well worth it.