Is the Walker LP system necessary if one already uses a good RCM?

I wish I were as certain of most anything as you are of everything, Mijo. Yes, I laugh at demagnetizing LPs, yet there are some who swear it made their LP sound better. And there were claims made that tiny bits of ferrous material do get into the vinyl mix from which LPs are derived.  I don't buy it either. What bothered me more about that particular Walker product was the cost.  One could go on to debate the efficacy of many other audio tweaks that seem to have no basis in science, but there are other forums for that, if you can stand it.  Yes, there was some voodoo in other Walker products also, but they are usually well made at least.  What I would balk at is for example the Velocitor "power line enhancer", at $4150 for a six outlet version and which probably contains a few capacitors and/or inductors for isolation. Nothing you couldn't make yourself for no more than $100, but most audiophiles can't or won't DIY.  On a positive note, I used their silver contact enhancer on connections that do not heat up, to great advantage, according to my ears.  Risky on tube pins that get hot because it hardens in place. Lloyd was not much of an inventor, the Proscenium is a beautified and max'd out version of the Mapleknoll turntables of yore, and the lesser products also are a bit on the me-too side, but he was very clever and a very skilled marketer and salesman. Plus he was a fun guy and very attentive to his customers.

@lewm , look Lew, you darn well know you can find people who still think the earth is flat. What people say or believe in can be wildly inconsistent with reality. I just call a spade a spade and move on. I'm sorry if I am not diplomatic. As far as I am concerned, you are what you sell, nice guy or not. This would make Lloyd a snake oil salesman.  I always though he had no part in this but you say otherwise. People like Mark Dohmann, Rob Robinson, AJ Conti , JR Boisclair , Dave Fletcher and Edgar Villchur would never resort to this kind of garbage. These are they guys that push on the limits of audio reproduction and would never resort to this kind of crap.