The use of a pedal for advancing Registrations is really for where you have a known sequence, it doesn't let you decide to go up and down at will (as you can were you using pedals to move OTS).
If you are sitting close to Ty3 you could probably still manage to push Regs. directly for what you need Scott (about a foot further for the LH to go) but depending on timing may have to be more discriminating at first and in some cases maybe use the RH to cause a change- if possible.

John

[This message has been edited by jwyvern (edited 08-08-2009).]