[Alan Duffy]

Funny I don't remember mentioning on MLU that I blew out the fuel lines.

In addition to a number of things I did was to blow air through the reserve fuel line and then through the main fuel line. The notion was to see if air would pass through. This was done from the fuel tank selector switch which I had removed to check it out. I wanted to see if there were any blockages. Before I go any further I must state that I of course removed the gas cap before I blew any air through the lines.
With the reserve tank I could hear the air bubbling up through the fuel, therefore no blockage. With the main tank the air would not pass through the line, therefore blockage. I removed the fuel tank plug and drained the main tank and then removed the banjo bolt, which I totally destroyed getting it off.
The banjo bolt was totally clogged with sediment. Not wanting to remove the fuel tank I was able to scrape/brush the insides and bottom of the tank. After modifying a shop vac I spent a great deal of time vacuuming all the loose sediment up. I poured in a small amount of fuel which drained quickly, let it dry and then vacuumed again. It was amazing how much stuff came out of that tank.
I put the drain plug and new banjo bolt ( Marcus Glenn UK) back in and added fuel and crossed my fingers. She fired right up! I think I have solved my rough running Ferret problems....maybe?
If I had more time or patience I would have pulled the fuel tank and had it fully cleaned and I would have put an copper tube extension on the banjo bolt.

So that's what worked for me.