I recently bought a Fuzion toy hauler to take my motorcycles with me on trips. I was anxious to find a chock system that a) would securely hold my BMW, and/or my Honda ST1300 or dirt bikes. b) one that would require minimum modification to the unit.
I believe I found it at Beast Tracks. I have just completed a 650 mile trip and nothing moved, the system holds itself onto the floor with J hooks into the TH's D rings and is removable when you arrive if you want living space to garage access.
Richard the owner of Beast Racks provided excellent customer service and made sure I was completely satisfied with his product, shipping was on time, billing was seamless.
If you are in the market for a way to tie down your bikes I'd encourage you to check out these.....