If they really are 803s then my advice is:

1) Get a chip in there that is DEFINATELY for your 803s and 3bar mate or this is going to end up in very expensive tears. The fact the tuner who fitted that chip didn't even want to put his name to it is worrying at best!

2) Get the amal fitted and wired in so ECU has some boost control and the wastegate pressure can be dropped. (have you checked it?)

3) Change the pipes on your control signal routes and bin that soft clear rubbish before it costs you an engine build.

4) Find out what the fuel pressure is as someone has messed with it. Ideally just fit new.

5) Change that fuel filter immediately.

4) Get a heatshield on that turbo before the whole car goes up in flames. And No, I am not exagerating...

These are only the things i would do based on the pictures you have shown and your suggestion you cant take it to a pro right now. I would strongly advise that ultimately you let a pro with AFR and datalogging equipment have a real look around and get this thing running right for you, then you just need to keep on top of it.