Periphery outer ring thoughts ?

If your turntable sounds great you don't need one.All the top turntables do not use them i would pass.

Never bought one out of fear I'd snag a cantilever. Invested in a flattener instead.

I have one and always use it on my VPI, would never go without it but like stringreen says, our tables are made for it. Slaw makes the argument for a record flattened instead, which I believe satisfied the same need to keep the unipivot arms stable in the vertical plane, which really allows these arms to shine at their best. Enjoy the music

I use a TTWeights ring on my older acrylic-lead VPI TNT platter that is unfit for the VPI ring,  I wouldn't be without one.  It flattens all disks, including those you don't think need flattening, and adds flywheel, which is always helpful.  It's also quicker to place than a VPI screw.  If I didn't have the TTW ring I would buy one from Waynes Audio, the only one currently at a reasonable price.  No connection.

By the way, I solved @slaw "snag a cantilever" problem by placing a small O ring on the arm lift and placing the arm just to the left of it.  I can put down the stylus with my eyes closed,  Would use it even without a ring. 

useful

but pain in the ass to use