Finally decided on the TT bag, which has arrived. And Maplins has been visited for power options. A bag of bits is at the ready for some amature welding! I think I'll bring power up from the battery to a small plug at the crotch end of the bag. Pass it into one of the side pockets where I'll have another plug to recieve it, which will have a lead that passes through a small puncture hole into the main compartment and a std cig lighter female socket finish ready for gadgetry.
Comments on the grippy underside marking the tank concern me.
Do I need to cut a grip mat underlay for the entire footprint, or just the bits under the plate of securing velcro at the crotch and the leather stuff at teh front zip end?
Thanks for the advice and guidance.