The TT system is overly complicated and majorly flawed. Even when everything is in 100% working order, they still drive like shit.
I have a bucket full of VF13/14 etc that have come off TT's that have been converted back to single. If you need a good second hand turbo let me know. If you want someone to problem solve a spaghetti of crispy 15 year old vacuum tubing, rusted actuators, solenoids and wiring loom you will need deep pockets.