This Battery Hold down is designed for 2s ShortyBatteries. This uses an aluminum thumb screw and aluminum stand off. The 3D Printed Clamp is keyed to the post do if your screw happens to loosen, it will not spin out of place.  No need for tape when using this. You can add or remove shims to adjust the desired height. You must have some sort of battery retainer for this to work properly.  This comes in a variety of colors.
 
NOTE:  3D PRINTED PRODUCTS MAY NEED TO BE PRINTED AND MAY TAKE A FEW DAYS TO SHIP.