I fitted one but didn't fill me with confidence at all so binned it and fitted the cut to length pickup.
Sorry that doesn't really help, but it's a way better solution than a jubilee clip and a bit of sloppy pipe.
My brother lost a really nice 1641 when the pipe came off and starved the engine. We've welded every one that we've done since then.
I wonder if it would work to make the pipe longer, so it almost butts up against the sump plate, then drill some decent sized holes in the side of the tube at the bottom to get the oil in?