Hello Mark & Gerry,
Interested to know how the 3000ME performs with poly bushes, as the engineering appears to be somewhat different. On the originals, there is a metal sleeve around the bush, and both the inner and outer sleeves are bonded to the rubber. The polybush has no outer bush, and no bonding. This could result in more radial give, and much less longitudinal constraint, than with the original bush. This could affect wheel alignment.
On the 3000ME the car's handling is heavily influenced by rear wheel alignment. Have you noticed any changes?
Best wishes for 2018
John