Build your own low-cost accelerometer based on the Tinkerforge Master Brick and the Accelerometer Bricklet. Use 8 screws 2.5x8 (mm) to fix the brick and bricklet to the base.
If you want to cover the accelerometer, use the top part which you can fix with three additional screws to the base part.
Before tightening the screws, ensure that the holes have a diameter of 2 mm, otherwise the material may break. If the screw holes are too small, ream them with a 2 mm drill bit.
For assembly instructions please see: http://www.planlauf.com/de/software/planlaufvibe/