Thanks guys for all that information, (its 7am here in UK and the boss will not let me switch on BIAB/Tyros)
But those instructions must work.
I can now understand why I was getting those queer deviations at speed etc.
Those pedals might be a step too far, there are already two and volume pedals going to Tyros. My little old brain might not cope with 6 of them.

Will let you all know how things go.

Thanks again. John, Devonplayer