I am using ProGrip High Viscosity Polyurethane Autoglass Adhesive. I buy it from the local shop that replaces windshields.What type of sealant are you using/where do you get it?
I got another retro coming up soon, and might as well try it!
The first couple day it is easy to take apart, but after that, cutting the sealant is the only way you will take the projector apart from the reflector. I use sharp blade.Good point, although how difficult is it to remove in case you botch the aiming or wanna switch projectors?