Sorry, I must misunderstand you - what are the joints I've asked about designed for ? lol ! I do support vendors on here, but remember we have to get stuff across to the UK so sometimes not economical.Dont be cheap, spend the extra few bucks, support the vendors here on the board and save yourself the headache later on the trail, plus you get a far superior part that is designed for its intended purpose, this is my 2 cents