If it were mine, I would get an electric 2 speed switch to put on the stick and then use an air solenoid to switch the vacuum. Something like a Horton 993281 switch would work fine. There is a guy on eBay that I have bought a lot of stuff from has the Horton switches for $75. Item No. 231549326443 A Cole Hersee switch can be bought for under $16 eBay 281406325825
