Hum in A15 MK1

Hi
Just built the A15 Mk1. Sounds really good ( modded as I described in other topic)
Hum problems, best heard of with singlecoils, with humbucker greatly reduced. Seems to increase with guitar close to PT. I have stargrounded with groundlift (5 ohm,2 rectifiers, cap) Used shielded 1 point grounded signalwire from guitar input to mainboard. Suggestions for improvment = less hum?
best reg
Lasse