fixing hum on Rega Rp6


Hi all-
LIke some other Rega owners, I experience a moderate hum that seems to have something to do with lack of grounding from the power supply.  I went ahead and ordered an upgraded power supply from Swagman Labs, which should take care of the hum and have other sonic benefits.
http://www.swagmanlab.com/Product_PSU?product_id=664

It will be a few weeks before that arrives.  In the immediate, I found this fix for running a ground wire from the existing Rega PSU TT.
http://www.audioappraisal.com/tip-ground-your-rega-ttpsu-to-reduce-hum/
I haven't done this yet, but my dad (an engineer!) is very excited to try this experiment over Christmas.  So my question is once I have the Swagman unit do I need to unhook this grounding wire, or is it likely to add value even with the Swagman?
Finally, will an upgraded power cord with the Swagman also be a worthwhile investment?
Thanks and happy holidays!
Margot
mcanaday
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Run a wire from the turntable ground to the preamp ground to eliminate hum!        ALL phono systems require THIS! Do this first before wasting money on another plug-in power supply! I am sure that what Rega provides is fine - they have been in business for decades!            Also, don't waste money on power cords! Contrary to marketing hype they offer ZERO benefit! Wire is the BIGGEST  B.S. factor in Audio!