After shredding enough timing belts to stretch around (forum Pedants please note the correct use of the term "around") the equator ... well three actually, I thought I'd give myself a fighting chance of catching the next one before it wrecks all the moving parts at the top of the engine again.
So I set about the top left of the timing belt housing cover with a 22mm hole saw (best done with the cover off the car) and printed a little cover held in place with a self tapper.
Having tried it with the fan and cowl in place I may modify the design to include an M6 thumb bolt on the basis that if it's easy to access I'm more likely to check it regularly!



This photo has been re-sampled for the forum, the origonal shows amazingly good detail and should show if any undue wear is taking place.