My brother machined a breather to fit directly into the oil filler hole in the crankcase and vented into a 1 litre container.

For my 1929 engine, I have silver soldered a breather pipe onto the oil filler tube and vented into a 1L aluminium drinks bottle mounted to a bracket on the flitch plate.

I have also blocked the breather holes in the tappet chest cover.

Peter

Mike,
My take off is from the timing chest cover.
The VSCC scrutiners are always very reasonable and helpful. Whilst the Blue Book says a 1litre catch tank, providing you have one, I think many fit slightly smaller ones on sevens.
What they Test most:
You have a catch tank
Rain light (For racing)
Play in wheels (King pins and bearings)
Steering wheel play
Wheel spokes
Two return springs on throttle ( not in theBlue book requirement but seems a VSCC requirement)
Your race kit is in date
Fire extinguisher
Master cut out switch, suitably marked
You should lock wire your sump plug and from experience, your oil filter, if you have one. Your oil filler cap too is it has the habit of loosening.
Good luck....are you going to be racing? More VSCC Sevens, the better!
David B.

Location: N. Oxfordshire

Hi Mike, Check out Alaster Gills Post Fume and valve chest cover.
very neat.

Location: TINOPAI NZ