I would delete all the can, including the charcoal canister. Another good source of a boost leak.
I would also plug the tip and vent the catch can under the car.
If you do the above you will reduce the chance of quite a few boost leaks.
And I would also change the split r for the new superceeded Vw OE 710n DV.
The difference it made after changing over a forge 008 was noticeable. I guarantee your forge valve leaks boost.