bollocks thought things were going too smoothly
a local firm managed to cut (with jigsaw not plasma) and weld on the 6" top ferrule heater element ferrule and female socket for drain
They did a fantastic tidy job
Got a ball valve from another local firm who it transpires can supply lots of goodies that we use
Highly recommend and I'll leave a link at the end
Anyway my nice shiny 6" to 4" triclamp reducer landed today from SDE and guess what it doesn't bloody fit
On measuring it transpires the Chinese ferrule is not 6" but nearer 7"

????
I would have ordered the ferrule from SDE but at the time they didn't have them in their range (unless I missed it)
So.....first option is to try my local mob who seem to stock this kit and it should weld on to the Chinese one without having to cut it out
If they don't have it I can get one fron SDE it just means waiting a bit longer
Biggest annoyance is the waste of money and time
still you live and learn
Here's the firm I mentioned earlier they can even get bespoke stuff made up
http://www.thomaspotter.com Paul Macdonald is very helpful