The sander in not active at the beginning, it's at 0 (off) position.
"At the beginning the circuit breaker is on, it should be off." i know, it will be set to that, see how many people will start to complain about that
Why they should complain . Railworks is an simulator and all about doing things that you need to do in real life ! if they complain than they need to play arcade games and no simulators!
driving to slow is not really a penalty. driving to fast is = penalty(emergency brake is more an penalty maybe you mean that like that? they call it restriction). pzb is all about safety and on time braking . there are the speed limits for so the train stops on time and not on a junction behind an hauptsignal.thats why an freight train have lower speed limits than an regular lighter train. most German trains are able to stop before an haupt signal on every speed limit that an pzb give as an train driver dont aknowledge that. there are probaly exclusive situations. cause by weight of an train etc