I replaced my dogbone mount over the weekend, if i can you can, took ten mins. Improved the gearchange which was the plan.
You've overtightened it. It only needs nipping up, it shouldn't vibrate.I just replaced the dogbone on my Cup with an Evol one with yellow bushes.All other mounts are standard and in good shape.The vibrations at idle and up to about 3000rpm make the car harsh to drive but all driveline shunt has been eliminated