There is no T anymore. The wastegate and turbo each get a line straight to the solenoid. All the connections happen at the solenoid.
I didn't seem to have any brass restrictor in my stock system, though. Just a single T and one end-to-end connector. I did use the end-to-end connector. You can see it on my vent back to the intake, where my aftermarket vacuum hose and a piece of the stock vacuum hose connect, right above the turbo, behind the small coolant tank). No brass anything in my system... I never had any trouble holding boost, though.
My leftover parts included the vacuum T, the two short hoses that it connects to, the larger vacuum hoses that connect to the stock BCS along with their big to little hose adapters, and another medium length piece of vacuum hose.
I just ran around the block again to check levels. I'm still boosting higher than I want, but getting slower response and no spikes. It in fact rolls slowly up to about 17-18psi. I'm going to lower my boost gain a bit to speed up spool and lower my boost map values to get it back down to the overall peak level I want. Got my first 6 count ever.