I have the QH05 on my bx. its amazing, and it will only be better once i get my hydraulic top link one day. I love not having to get on and off the machine to put the box blade on or off. the machine is compact enough that i can reach the handles without leaving the seat!! it works on everything i have with the exception of my unknown age rear mower. i did modify my trailer hiths adapter however i find i rarely use it because i have one i can put on my FEL so i generally use that one and then have the blower, BB, or BH on as my rear weight.
for the pin adapters, i agree with whomever posted about bushings and pins. i spent a couple buckas on pins and bushings for the tops and i jjust leave the pins in there for the hook. The lower hooks all fit with the LP OEM supplied pins