Not sure if that works but certainly if there are magnets in the bottom part of the sump it will collect most metal filings that will damage the internals.
I bought a sump plug with a magnet on the end of it from VPW which does a reasonable job.
I use that in my 292,000km R31 skyline.. Works a treat.. Thinner oils are useful depending on the temperature ranged used or what sort of driving you will be doing.
Laminge magnetic sump plugs don't normally cost the earth.. You could magnetise you current sump plug for almost nothing.
Filter should catch it anyway.. But it would be nice to see if you have a major problem everytime you change the oil.
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