HexBug nano platform walls

Walls for HexBug nano platform - http://www.thingiverse.com/thing:2106431
wall_2.stl - Standard
wall_1.stl - Using posts - http://www.thingiverse.com/thing:2110262
wall_3.stl - Standard with gate
gate.stl - Gate for wall_3

Track - http://www.thingiverse.com/thing:2138143

ps. - The size is also an issue for me, it happens sometimes when I export from sketchup objects. Try to scale object up to 1000%.