Doh reading manuals and wading through the attachment tables and a calculator does sometimes prove useful
CV 53 is for the lsmoke power level and CV 50 is for the light power level - since each step works out as approx 3% of track power means that I need to set this to 25 (25 x 3 = 75% of track power, 75% of 24v = 18v bingo).
Chuff rate is set up CV 120 - value between 1 slowest and 15 fast pulse - assuming this is generating the pulse for the analogue LGB sound board - will explore and see what works best.
Update; made changes:
Lights and smoke seems happier - may dim lights some more to fit oil lamp look.
Sound wise: CV120 was set to 0 - continuous operation - changed this to 1 and seems to work much happier at slow speeds - no longer getting 3 chuffs or part of a chuff - obviously waiting until I sort out Dietz sound module for the susi interface to upgrade sound to digital.
Programming CV's still a bit of a dark art - should hopefully get better as get more familiar with the JMRI decoderpro software and the principles in general.
Alex