Transmission serviced and no more slipping, so feel like had a bit of a win there. That o-ring for the filter is a real bastard but got there in the end.
Oxygen sensors replaced with no change with how the car idles when in gear, starting to really get me frustrated now. Even thought of the MAF so went down to auto 1 and got a tin of MAF cleaner (at $25 a pop!) but that didn't help either. On the plus side it starts up a whole lot better. Could do the idle relearn procedure again, doubt it will help but will probably give it a go just for the hell of it.
Had a couple of phone calls from insurance in the last couple of days, they are sending an assessor out to my place next week to go over the car with me so I can show them what I'm not happy with. Turns out the repairer, who would have known of the previous repairs early on with having the car, didn't even tell my insurance of the previous repairs that supposedly stopped them from doing what they were supposed to do properly. Hopefully it all works out and I can get the Senator repaired somewhere else because it aint going back there in a hurry.