I designed these to hold the front panel for http://www.thingiverse.com/thing:23386 but then as I thought about it I made it do so much more.

Print one set out for the front panel of http://www.thingiverse.com/thing:23386 slide them on and slide your front panel on and off all day long.

If you don't have laser cut parts you can cut square pieces of acrylic and it will work just as well. The same holders can also be used for the sides.

For the front get a pieces of 3mm acrylic cut to 15-3/8" Wide by 8-3/4 Tall. For the sides get two pieces of 3mm acrylic cut to 9-1/8" Wide by 8-1/2" Tall.

They would also go well with these nice little finger handles. http://www.thingiverse.com/thing:27532 by http://www.thingiverse.com/Fastrack