JMO but your bike can't be too cheap. Harbor Freight makes some pretty good stuff and it usually is worth what you've paid for it. Sometimes, however, you do have to pay more for a quality product. The Condor chock is worth the price, if only for peace of mind IMO. The Condor Trailer chock can be had for about $100 more than the Harbor Freight unit. Some things aren't worth cheaping out. IMO of course.
I agree and may likely go with the condor for traveling and get a HF for garage work. Securing the chock without having to bolt it down or having extra bolts/pins sticking up is my dilemma. I want the garage to be a usable living space when I go someplace and remove the bike. Quick release chocks and tiedowns, piece of carpet over the floor and enjoy.
What do you use to secure the aluminum bars to the D rings?