Used it as a replacement part for Instep trailer. Wasn’t an exact fit but was able to trim down by 1/8” and now fits perfectly.
Bought for a copilot as to use on another bike, but holes do not line up. I saw a few reviews on Amazon stating this issue, but figured they were one offs. Nope, does not work as advertised. Sure you can go grind the whole thing down, but kinda pointless to buy a grinder to fix.