Hi guys,
Have been busy with work, will try the cousins guy but will probably have more luck with my friendly watch guy, what i was going to do was find a bolt or 2 of the same dimensions and use these as a dodgy tap (look in cheap alarm clocks, carby parts suppliers or even old electrical gear has similar sized bolts) Heat treat them, file the tip of the bolt to a reasonably long taper and they work quite well, at least on other stuff i have tried them on. I should have thought of this and ordered a handful of tubes, they are about $4 from cousins as opposed to $30 for the crown. Will hopefully get a look into the project this weekend, work permitting, have emailed cousins so will keep details posted.