Where abouts are you guys getting those fancy metal vacuum fittings from? are they really necessary?
For wet lay up / vacuum bagging and CF PP oven / auto claving curing… yes!
Bondline products is the orginator but Airtech has them too, MacMaster Carr for the quick release couplers.
I dont use them…I use some peel ply wrapped around the hose so it doesnt puncture the bag.