Had half hour spare earlier and I've got a bit fed up of oil vapor from the breather on the rocker cover which collects inside the filter and drips down the back of the engine, so I decided to make an oil catch tank.....
Take one old argon gas bottle and chop the end off

Chop it down to size

Weld on a inlet and vent

Will have to sort through my fittings to find appropriate elbows for a view/level glass then I can weld the top back on.