Electric exhaust cutouts seem to be problematic. Boost actuated cutouts look like they would be more reliable.
For the big poly bushes I used a 3" piston ring compressor. At first I tried putting the bush completely in the compressor and was getting nowhere. The trick was to put the bush only half way in the ring compressor, this creates just enough of a cone shape for the edge to sit a bit further in the torque rod, and this then allows them to get started when using a press.
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MY97 940 CD LPT Super Sports Edition 2 Turbo, Midnight Purple, 175,000 miles.