Some have been altered to use a foot control, but either way the outlet and or the knee control is missing. Knee controls, especially the bayonettes are VERY expensive to replace. They cost upwards of $30-$40 for the knee lever. And, I'm not certain about this model, but the models following this one need pulley drive replacements if they've sat unused for longer than a week or two, which can cost $30 or more for the part and labor of course, if you can't do it yourself is worth more than the machine is worth. This should be considered a parts machine only.