You will need to print 3 sets of these braces. Each brace has a relief channel in the back to take a wire (from an end-stop, for example).Use these in conjunction with turnbuckles and spectra / kevlar / steel line to help stop the frame of your Kossel from twisting.I have got these fitted to the machine, but the Kevlar line that I was using was too thin and snapped. I will try again with spectra line.There is a bit of flex in the brackets when printed at 60% infil, but it has to be an improvement on the original setup.