Update on the shimmy: I took the rear rack off and it stopped. The rack is a super sturdy yepp number, and I think it stiffens the back up so much that it sends all reverberation back to the front somehow. I tried to remedy by putting leather washers in between the screws and eyelets. Also pulled the sliding dropouts forward on the wolverine a bit. Let's see if that makes a difference tomorrow.
Update on the shimmy: I took the rear rack off and it stopped. The rack is a super sturdy yepp number, and I think it stiffens the back up so much that it sends all reverberation back to the front somehow. I tried to remedy by putting leather washers in between the screws and eyelets. Also pulled the sliding dropouts forward on the wolverine a bit. Let's see if that makes a difference tomorrow.