I am looking to do some production 3D printing with the tool changer and I want to avoid the use of traditional extruded support material for an overhanging lip on the part. The idea is to instead use a tool head to drop in an insert (that will likely have PVA glue on top of it) that will be used as the support, and then the print continues over this insert. After everything is done, the inserts can be pulled out of the part by hand and re-used. This should save some time both in printing, and in support material removal (not to mention cost savings of not having to use up support material). Anyone have any ideas on the insert dropping system? The inserts I have in mind are rather thin (2mm thick, and about 40mm by 30mm) probably use fiberglass or perhaps even aluminum or steel plates. I am thinking of basically a magazine of these inserts in the tool head and they get slid out 1 at a time after insertion (kind of like a coin dispenser). Or perhaps using magnets to hold them and the tool head motion to release them. Or perhaps a servo to slide them out of a dispenser. Any thoughts? has this been done before?