Valpast repair/addition work can be done, but as mentioned before it's NOT a chairside procedure. Most labs that offer Valpast can typically turn a repair/minor addition (1 to 2 teeth) in 2 to 3 working days (at least that's what the 2 labs that I use for removeable can do it in).
Just got to inform the patient, and if your adding a few planned teeth, typically talk to the lab before so that you can give the patient an accurrate estimate of the time they'll be without their partial