Paul, looks a very sturdy sump plate, much better than the original pressed steel ones which I still have fitted, I bet it seals much better.
What I am endevouring to do is to positively direct the oil flow to within the magnets "magnetic field" of operation rather than leave it to chance like some sump plate magnets may do. This is by no means a new idea but one that has been used for years, definitely within the operation of an aero engine. It can also provide a confidence level of the health of the engine ie nil particles, high confidence etc..
It also provides a challenge to the old grey matter, particulerly on these dark February nights, not much on the telly..
Warning- please keep magnets away from heart pace makers.