It will be easier to find a two-speed switch instead of a 3-speed or variable speed switch, and 2-speed motors can be had for less $ than the other. As CP said, the linkage is different between 2-sp and 3-sp. I have a set of 2-sp linkage and a set of 3-sp linkage. When you decide what you need, you can PM me about the linkage if you wish.