Vibration Issues / Turntable Decisions

Do not get rid of your 150, as you have it modded, will be hard to beat.

If you can absolutely not use a wall mount, you could also try securing the backside of your stand against the wall by wedging a piece of wood between it and the wall. By doing so it provides a secondary plane for stabilizing the stand and will eliminate 99 percent of the floor wobble. If that works you can then make an adjustable one using a piece of wood, a large bolt and a nut. The cost would be just a few dollars. You would use any shelf side facing the wall on the stand as the anchor point. The higher up the better, but I have had success using lower shelfs, too.

Secure your supporting table to the wall behind using a turnbuckle, a piece of wood of appropriate size, etc. This has cured many of these kinds of problems.  When this is corrected your next step would be an Ortofon Black.

Here is my setup. As you can see the wall-self would look quite odd. I will try securing the cabinet to the back wall, good idea! The TD-150 does go nicely with the Decware equipment, I would like to keep it.

https://cdn.pbrd.co/images/GMBMhCy.png
Out of curiosity, would there be any benefit to moving to an MC cart or is a 2M Black going to be a great spot to hover around? The MMF 9.3 came with the Eroica LX MC, which was appealing, but of course that also implies a $500-1200 Step-Up Transformer pushing the total upgrade cost a bit up there.

hifiron,
What are those unusual speakers?They look really good.Good luck with your vibration issue.

@roxy54  Thanks! They are Decware HR-1 radials, absolutely amazing! I'll try some bracing this weekend and report back on my status.