These are realy not hard to build , I am a pretty good wood worker , and have done many rebuild's over the year's.. I am lucky to have a full work shop. These can be built to any size opening and depth. And I think they look much better than plastic inserts . My partner think's we should we should start offering them for sale ? any way the next project will be the cudddy door (very easy) A few photos of some of my work