Smoothieboard Sliding Tray

Slide out tray for mounting a smoothieboard to t-slot extrusion. Printed without top and bottom layers but with extra perimeters for better airflow.

For printing the frame mount, I added support under the outer perimeters since the slicer only seems to support bridging infill.

**Filaments:** (full list can be found on [thrinter.com](http://thrinter.com/filaments))
-- [Hatchbox Transparent Yellow ABS](http://thrinter.com/walters-filament-collection-abs/#hatchbox-tyellow)
-- [Hatchbox T