Tidy work with the custom pipework. The Fmic makes a big difference compared to the crappy SMIC! If you throw the 150 turbo on I'm not sure how much power you'd get as the fuelling is a big thing with tuning diesels I believe, and the 130 has the smaller injectors!
Fit a decat, either cut out the orig or get a decat pipe and possibly a turbo back exhaust, and you will get a few more horseys and more torque, the decat is so sh!tttt.
I bet the tuner is to blame, 2.1bar is pretty high I think
Try posting in the remapping section for any tips!