Are you letting the wolf ecu controll your boost?
If you are a gauge is not necessary, as the wolf will keep it at your desired setting and if something does go wrong i am pretty sure it has overboosting protection.
Personally, i am not into gauges, so i do not see the need for one.
GOOD LUCK with the install and tunning. I have been very pleased with the unit myself. Only one small glitch, i can not keep the engine running with my turbo timer , but hopefully that will be sorted soon.