Troubling noises/dead turbo/need help

[Slam Wagon]

So after nearly drowning the car a couple of weeks and now fitting a FMIC this past weekend im having some troubles.

It can happen on anything more than gentle acceleration and it sound like ive got a bolt stuck beind my dash, a weird rattling noise. Im worried my turbo is dead/dying and fitting the intercooler has just made it more aparent. Ive fitted a boost gauge at long last and its reading around 13-14psi when i put my foot down, im not sure how much i trust this gauge though due to my pikey fixings with the piping.

Ive also had problems with vibrations through the pedals, ive made sure nothing is touching the clutch cable as this was the prime suspect but im still getting some feeling through both the clutch pedal and the accelerator but not the brake. Its a very tight fit for the c5 bottom pipe in that gap.

Im wondering what and how i should be checking to confirm any suspicions about my turbo?

I will get under the car again and get some pictures of the pipe fitment one night this week and i will do my best to get a video of the noise but i doubt ill get a good sound recording with the rest or the shake rattles and drones from the rest of the car.