Hi guys I have not looked at the whole range of C/V joints made by HPI Racing. There are similar ones made by other companies but in my search these ones I purchased came near to what I was looking for & which I felt with a little bit of work would fit. I feel pretty sure there are others out there that can do the job too it is just that I found one that I knew I could modify to fit most applications that I was using or going to use in my boats, (1/16 Tamar, 1/12 Tamar, Smit Nederland,and the Fairmount Alpine) I have now modified 3 sets of these & had no problems what so ever. Dave (Norseman) has one I sent him to try & photos are on the engineering thread. It would be nice if HPI racing took the time to take my phone call, but I hope my letter will get a better chance to reach the top.This particular joint is very easy to adapt to most setups that we use on our boats, hence the choice I made. There were others of a similar design but would have required more work to adapt. You are correct Martin Huco do make other joints but still in the same design & with the same problems, they were what got me started on the hunt for a better joint in the first place,I feel I have found one. Mick B.