Hi Going Bald.
Yes, I installed Clover and Chameleon. More than one Clover as it turned out. In one combination Clover Configurator confirmed that I had booted with Clover on the HDD so I changed BIOS boot options. They were set to first boot P4: Samsung and with the USB in the machine booted using Chameleon. When I changed the first boot to be EUFI: Samsung it booted without the USB. I tried rebooting many times and it's seemingly fine and stable. There's a bit of an issue with the TP 2111 PCI ethernet card but the main board ethernet works at 110 mb/s so I'm drawing a line under it! Thanks for replying! Kind regards, Nick