Let's help get Silver to the bottom of the boost loss issue. That has nothing to do with a tune on his modest mods.
If he does not have a DH, then I hope he has or will install an inexpensive manual boost gauge. Since he did have some boost data, I assume it's from that gauge. Hopefully, tightning the tube clamps solved the problem.
Hell, I don't have a tune and don't really see the need for one for my particular use of my car, even with a catless dp/rp.
If you guys with tunes are running quicker than 13.4's at 106-107 on stock tires, and hitting 60-100 quicker than 6.3 seconds, let us know. Don't give me dyno numbers. Give me ET's and trap speeds. Give me some stopwatch timer numbers. That's literally where the rubber meets the road. On the open road, I can run with Cayman S's (to their considerable surprise) and the like and that's good enough for me.
I prefer to stay pig rich and have all the stock safety measures in place, including cold weather fuel cut on the stock tune, rather than pushing boost too far or risking leaning out the engine for just a few extra hp. I don't want to go around constantly worried about whether my tune took everything into consideration to keep me safe.
I have nothing against aftermarket ECU map changes and applaud those who get deeply into this and do it safely. But you'd be amazed at how accomodating and safe the stock ECU is for sensible mods, even up to catless dp/rp and the approx. two extra pounds of boost that brings with it.
Back to Silver: Did the tube clamp tightening solve the leak? If a gauge is still showing boost loss early, I have another couple ideas, one still on the intake side, the other with the fuel system.