Swapping Platters on Thorens 124

Anticipating. I haven't wanted to try it because I don't want to risk damaging the Decca. I also use a Herbie's mat with mine and it's super thin. I was able to grab a non magnetic platter for cheap so I thought I'd give it a try before I invested in a new aftermarket one. 

What mat do you recommend that could block the magnetism if I want to keep the aluminum top platter?

Thanks for responding!

Yes, that is the case. I have an aluminum top platter which is a great upgrade but still use the iron bottom platter. I've just purchased a Woodsong Audio thingy that replaces the pop up 45 mechanism so any mat will work and I bought an Achromat to hopefully raise everything high enough so the Decca will work. Fingers crossed. 

That's very interesting! Thanks for the info. Looking forward to giving it a try. 

So I got the Decca and used it with the magnetic platter and an 5mm achromat and there's no problem at all (I have an aluminum top platter and that may help too.)