Gridinfinity Accessories

A friend of mine asked if I could design additional tiles for the Gridinfinity system as well as a way of propping up tiles so that they may be held above the table (such as for a castle in the sky or multi-level building/room). To this end, I designed two means of suspending tiles, a stilted platform and supports to rest upon; both can use the same stilts. There are also some more floor and door variations.

Any recommendations are welcome.