I designed this for a project of mine. It is meant to attach the to the front grill of my RC car and hold 9 infrared sensors facing the ground, for following lines. I designed it for the TCRT5000 IR sensor module and my Redcat Earthquake 1/8 scale monster truck. The height off of the ground is adjustable.
I used a 4mm brim around most of the parts to deal with warping.
How I Designed This
I designed this using 123D Design and repaired the models using Netfabb basic.