Hi all, I've recently had my Bachmann Tornado DCC sound converted by a certain retailer. I was tweaking the CV settings for a good 2 hours yesterday for the correct wheel to chuff revolution, but cannot get it accurate I checked all relevant CV settings before i made any changes as i wanted to know the defaults if any problem occurred. My understanding is, with the Loksound V4 CV57 and CV58 control the wheel revolution / chuff syncro, however also amending CV2 which is the start voltage can throw all previous settings out if this is changed afterwards. As standard CV2 was set to 6 which is far too high meaning the loco wouldn't move off as slow as i'd like. I changed this down to 1 initially, but had no luck in the fine tuning CV57 and CV58 into something i deem acceptable. I chnaged CV2 to 2 and looked again at CV57 and CV58, and although better, i just cannot get an accurate represntation of the correct chuff to wheel syncro from a standing start to mid speed. Sometimes it appears in time, but then loses it when either speeded up or slowed down. Currently with CV2 set to 2 i have CV57 set to 35 and CV58 set to 18. However the jump in 1 value either way with CV57 and CV58 are too big alteration and it throws the timing completely out. Amending CV2 to a higher value does appear to reduce the change in sound chuffs much less, meaning a more refined adjustment can be made, however setting the value of CV2 too high and the loco doesn't start as slow as is required. Is there anything i've missed in these tweaks? I've also amended CV54 and 55 slightly, to get the running of the loco smooth, but i sorted all the running issues out before making what i thought were the final changes to synchronise the chuff and wheel revs. Can anyone help?