The original stop/start lever on this Dual 1214 has broken off leaving behind only the shaft. I've acquired a new lever and plan to install it. I expect it to be a very easy fix.
Since it seems like you don't want to remove the knob and epoxy it to the correct shaft, which is the obvious approach, you could make the shaft on the new piece smaller so it will slide into the collar.
Seems to me that it would never be tight or reliable. Having never pulled one off, I just thought it wasn't possible without damage and stretching the hole larger.
Do you know how i can take out my turntable out of my console stereo? I have the same turntable as you in my electrohome console but my start/stop dosen’t work. All the other things works perfectly!