DIY magnetic oil filter

[Fazerider]

is it possible at all that some of the deposits could be due to the hacksawing of the filter? I am all up for free mods but would like to see one cut open with a pipe cutter instead of a hacksaw.

In fairness it could just be a little hard to see on the picture.

Yes, the picture isn't great... my camera won't focus any closer. And there are a few bits of swarf from the hacksawing process, I didn't have a pipecutter that size and it was tricky operation to do neatly without moving the magnet and losing the evidence. But the debris from cutting is all big shiny chunks of steel, quite unlike the ultra fine black dust that the magnet collected.