Hi Steve,
Yes Woodford Garage Motorsport are pretty good with Cosworths. As well as their extensive stock of Cosworth parts they also have a couple of Ford RS trained mechanics on the garage side of things.
I know the owner, Simon Lester and he knows the marque inside out and he is a pretty good guy to talk to if you have problems either technical or from a parts point of view
If you are having problems refitting your bottom arm it is often easier to get both front wheels clear of the ground and slacken off the big nuts but dont remove them (22 or 24mm I think?) on the front of the anti roll bar, and slacken off the anti roll bar to body clamps a little. This will give you a little more movement.
When fitting new poly bushes dont forget to give them a liberal coat of copper grease, this will help them locate properly and tighten everything up if possible when car is on the ground at normal ride height.
CheeRS, Mike.