Andy sorted me out, and all is well!
Back to the original thread, after having to remove some of the knobs on my Pro 2 it can be done, and I'm sure there are knobs that would fit, but I wouldn't recommend changing them. Wider knobs could possibly obscure the layout, but more importantly, the current knobs appear to be designed to protect the pots in the event a knob gets hit with any amount of force.