Hi Ferd
On my Polly 5 loco which I told you about some time ago, the regulator operates anti-clockwise to open and clockwise to shut, but in our club I have driven locos which operate the other way. I have to admit it does seem a bit strange and possibly risky, but I have never had a problem with that. I guess if one takes over a loco to drive it, it should have been handed over with the regulator shut.
Incidentally, some full size locos over here have regulators that operate forwards and backwards. I think they are closed in the forward position.
Cheers
Locomate