Anyone have a home made ( DIY ) Chock / tie-down system?

Here's how I have our street bikes secured:



No holes drilled in the floor and the I use the existing D-rings. You could get some cheaper chocks, like from HF, but the Condor chocks make sure nothing moves and no need for huge amounts of hold down pressure either. Bolts come up from the aluminum plate through the chocks to hold them in place.