I like what Ghenghis_ska does with a larger layout piece which has the ability to link with the TLX system. I will probably utilize that once I get a cheaper source for my foam core. But Don't plan on making any single tiles that are lager than the TLX tile.
I have a large space ship "Bone Yard" on an over industrialized (raped) planet. Many encounters will happen there. The speed mount method combined with G_S hybrid will fir my needs nicely. I will still be able to a vast open area but be able to place props, cliffs, etc. I used the Mars Station model set for my first encounter with the group who went quickly to the ship they are going to clear and refurbish. Other than a few "Hobo" encounters I really didn't have much for them but pictures, yet with this method I can make a general terrain which can be added to with props and TLX dressing. Hopefully
Dennis