Homemade glory hole

Making a glory hole with a hole and two zippers help

I’m making a home-made glory hole essentially for the doorway with two tension rods and fabric
height wise it shouldn’t be a problem because it can be adjustable slightly with tension rods it’s more the position of the zips from the dick hole if anyone’s got any recommendations or guidance. if anyone has one with measurements that would be great… I want to surprise my FWB 🤣