Phil,

The drawing looks like its from the plans I posted in the Knowledge Libraryicon, just beware some measurements are not correct, it will be obvious on some parts, the barrel nut being one of them, which is in fact 37.6mm (ish) the .6 does vary as the nut does take a few knocks so you need to take a few then work on a average, I,ve made two new Mk V grip clamps for members, the problem is I had to go for an average measurement which was based on two barrel nuts I have and the average was .6