If it cheers you up at all Rob, toyota recommend changing your balancer every 10 years. The revised design from ross works a lot better. We went through the teething issues with it as well.
Ross performance change hands a few years back, if it had **** itself a bit earlier, you might have gotten a discount.
As mentioned, mounts need to be dropped. Cars woth stiff mounts i have found it easiest to removed timing belt side mount, amd depending on exhaust, either remove bolt from rear mount, or loosen rear subframe.