Sign man

Hi Chucks signs. Yes, clip is easy. No tools necessary to remove face/return component. A rivet would actually be a better method for attaching the clip to the back panel if flush mounting is required. I don't know that anyone creates a truly water-tight channel letter. Weep holes would still be required. Yes, people do build, install and service Trimless letters. Chipotle has done a number of Trimless projects with this material as have others. Hope this helps.