well to be fair they don't wear out that often. And given the number of machines of this design around you'd think they'd be a standard stock item.

I'll try the right nozzle again with known filament. If it works I'll just use it till they're both worn down to the same level :-)
Just make sit tricky for dual colour stuff and I'd like to do some of that.

Might have a play with the levelling screws as well.