Hi and thanks for your post. Simon who developed the kit and does all the work himself works in the family garage, so he has to work around whatever work comes into the garage. He has a stage 2 sportcross with the piggyback ECU and about 300bhp in his. Not sure I would want to go that far with the standard motor. I think mine was the 16th or 17th conversion he has done and has developed the kit over the last 18 months or so. Mine was actually the first polybush kit he has fitted, he hasn't even put one on his own yet, mainly because it is such a pain to do and took a full day to complete. Costwise it is about as much to buy as it is to fit, so around £900 all done. for me together with the LSD from the sport model, it has transformed the car. it is a bit more firm but in a secure reassuring way and not uncomfortable as you would expect, especially as I have coilovers and roll bars too. But I chose the Meister R coilovers as they have softer spring rates than BC or any of the Japanese ones that are made for their ultra smooth surfaces and not the collection of potholes and patchwork repairs we call roads!
Personally I would go manual if you are going to fit the turbo so you can make sure it is the right gear when you need it, you might find it lags a bit more on auto, but talk to Simon, he will go through the pro's and cons with you. Yes he knows his stuff and loves doing it and just wants the customer to be happy, which so far I certainly am. If you want to know anything please just ask.