Peteski,
I use NCE and have a test set-up at the club with a Power-Cab, when it comes to DCC I am about as bright as a blown light bulb, but as I received no advice with my original question I stuck my neck out and went for the only thing I could think of.
I keep reading that CV29 does miraculous things, when I looked at it there was just zeroes so I just put in a one.
The loco is at this stage still unlettered so is running default 03, all functions seem OK (with my blown light bulb intensity), the loco still has a hesitation in the sound like a broken loop, but at least for now it is operable.
Teditor from the Land Down Under