A big thanks to all of you for your replies, really appreciate it!
I was suspecting with the equipment I have it would be difficult to get the sustain pedal to act like an expression pedal, in the truest sense, so thanks for clarifying that.
However, you mention that my pedal probably isn't capable of producing continuous output and if 'continous output' means what I think it does, then no, it cannot. So, continous output - am I right to guess that's the kind of output type that would be found on most foot rocker pedals?
If such is the case, then I fear I might've worded what I wanted to achieve inadequately (non-native English speaker) and apologize for that, if so.
Not trying to insult or undermine anyone's intelligence, just wanna clarify: I actually want my sustain pedal to function as a ramping switch (with hold operation); push down - cab spins up, release - cab slows down.
This intrigues me, gonna try setting that up tonight. I'll write back again if I can't make it work if that's OK?
Best regards,
/Ben