Thanks for that,
I will keep this posted as to my progress, I am still looking for a better barrel and will try sleeving the manifold first.
Upvote 0
I used 2mm at the valve face end with a sort of taper to 5mm at the barrel side haven't got a taper drill of the right size, so it's stepped with a large chamfer at either end, I originally intended to contour both sides with corresponding surface match, but this proved too much of a pain so contented to contour the barrel face to avoid the insert being pushed up enough to hag up on the barrel TP and the result was a gap at the valve end, but it's a resounding success!Curious what size ( I.D.) you choose to test with ?