Dragon I love using a knee lever, I much prefer it to chasing a foot controller around the floor. I have two cabinets with knee controllers. One for my vintage Singers and one for my other vintage machines. Both have a very good controller in them. It's so much easier for me to have complete speed control with a knee lever.
I don't know how you deal with packing around such a heavy machine, I hate just loading them in the car to go somewhere. There's no way I could carry one around on a bus.
Cari