Andy, front or rear wheel alignment normally does not cause vibrations.
You have a rotating mass that is causing your vib(s).
Having had work done that required the wheels to be removed, could you have a wheel that is not square with the hub, lug bolts tightened and torqued to the right amount and done out of sequence?
Check for a rotating mass!
Happy Trails Beep Beep from Houston!!!
Donald, El Cheapo