So, as promised, here's the update (spoiler alert - rant!):
I took the car to Magnum Performance this afternoon to diagnose/repair some of the issues I've been experiencing.
Darren put the car on the ramp and what we found threatened to ruin my day...
1- there was a heavy ATF leak coming from what, appeared to be, the sump. Darren was able to source a replacement which was delivered within the hour. Whilst waiting for the sump to arrive, he proceeded to remove the old sump only to discover that it was cemented with an unreasonably copious amount of silicone!! After considerable effort, the sump was removed. The new sump was then installed and sealed correctly. Unfortunately, as it transpired, the garage that carried out this install had failed to fabricate a bracket for the gearbox dipstick and over time, this eventually caused damage to the pipe leading to the sump, hence the leak.
2- due to the amount of time the sump took to remove, resulting from the bizarre way it was cemented in place, we didn't have much time left in the day to fully diagnose the ACT/boost issue; however, the following was noted:
1- there is a strong smell of fuel under the bonnet which appears to emanate from the inlet side. This is being drawn into the cabin causing all sorts of problems, as I'm sure you can all imagine...
2- the intercooler was left to hang from its pipework!!
3- the car is running rich at idle with an AFR reading of circa 13!
4- the engine breather on the turbo side has just been capped off causing the engine to breathe heavier.
5- there are a plethora of silicone joints which are almost resting on the manifold. Unfortunately, we didn't have the time to remove the surrounding pipework to inspect for damage.
6- there is evidence of smog coming from around the wastegate indicating a loose install.
7- the engine dipstick was left hanging as the installer failed to fabricate a bracket to fit around the SRD inlet causing engine oil to spew out and run along the exhaust.
8- the washer fluid tank has been replaced with a BAG(!!!!) as the original container clearly could no longer fit due to the aftermarket inlet.
9- there is a misfire at low and high rpms, suspected coil pack(s) issue.
I am not pointing any fingers here but it would appear from the evidence that although the parts used in this build are of high quality, the same cannot be said for the workmanship. I am unaware as to the identity of the installer; however, by the looks of it, it is an individual who not only lacks in competence but also integrity. Thankfully, the car is now in good hands. I have arranged to take the car again next Saturday to have the remaining issues addressed. Will keep this thread updated with further developments...