This is a work in progress. I just started and nothing is attached yet. I decided to go with plastic runners and they have not arrived yet. I'm also trying to decide if I want to add any features, such as T track in the base or maybe a replaceable zero clearance insert. Adding T track to the base will weaken it, so that's a con. Adding a replaceable zero clearance insert might be difficult to keep everything flush so that's also a con. My old sled had neither and it was perfectly fine so I'm leaning toward just keeping it simple. Does anyone have those or other features in their sled? If so, do you find them useful?