Garage Keyhole Rack Foot

I recently installed Race Deck flooring in my Garage to replace the carpet (?!) that was there when I bought the house. On the carpet the rack was immovable without completely emptying it as it caught on the carpet. On the Race Deck, the angle iron legs dug into the plastic. 

I could not find anything lying around that would spread the load and stay fixed in place under the legs, so I threw this together.

I printed in PETG at .25 layer height with a .4 nozzle, structural, for this application I think anything would be fine.

On my prototype I went with default bottom layers and there was a satisfying crunch as the rack sunk into the infill - I knew it was not going to budge. For the final version I printed, I increased bottom layers so there was no infill below the leg. I also tightened the radius to better match the angle iron making this a snug fit without the crunch. This gives 10+ layers of plastic to spread the load a little bit across the foot. 

I was able to move the rack, fully loaded, on the race deck to make room for me to finish the floor. No visible damage to the floor unlike when I slid the rack when it was empty.

I installed the feet with the rack loaded by lifting one foot at a time using a bolt through a keyhole and a heavy duty Dewalt TOUGHSERIES Construction Jack.

I could not find anything like this out there, I hope this helps someone else!
f3d file included, I could not export step file for some reason.