These were another part of the vibration during acceleration... It has been significantly reduced again, but there's still a little around 60MPH. I think it's the tires.
.
.
.
.
.
Molding your own poly engine mounts***********UPDATE*************
Turns out that last vibration was the rearmost u-joint, which hadn't been installed correctly, and was holding the d'shaft offcenter. Loosening, centering, & tightening it solved the last of the vibrations.
