Thanks for replies! yes I meant rigid, though a ridged rim would be interesting, to grip chains maybe, not sure if that's legal, never heard of that, I think the rules require a uniform outer diameter. Grip ridges on the contact surface for your fingers like on the nova JR pointed out seems potentially good for short push putts, I mean the finger push and grip is really important, and they're not really even flying/floating, but the nova seems like kind of crappy disc in general
So it sounds like 165g is the lightest you'd ever really want for a push putt, or any putt inside of 30ft, but most like 175g 21cm disc unless it's a longer putt or no wind concerns. Dissc that make the most sense are the Wizard S-series, though I read somewhere they have 2 other types, not SS or SSS that are really hard as well but different feel. KC Aviar or the new McPro Aviar, same thing but no bead, generally the most used putters by pros and a mold that's been tired and true since 1988, heard from a local pro it was actually called something else back then, before KC even. or Pro D challenger/magnet. Pretty much the top stiff plastic putters that are neutral.
I think the McPro might be the best way to go, just not sure if I'll like the feel of the shape without the bead, have to find someone that's carrying it as it's only available from the special warehouse site as of now.
I guess the only significant downside to these stiff plastics, besides subjective personal grip feel, is that they just simply have poor chain gripping ability and can slide off the sides more easily, but is not supposed to be too much of factor at slow speeds. To me this just begs the question though, with discs like the anode/ion and nova why not make the same stiff discs preferred for putts (Aviar, Wizard, Challenger), but with a sticker plastic/rubber just on the VERY outer rim, wouldn't need to be more than a few mm think and your hand has very minimal important contact with that part of the disc on putts, it's just pressed against the palm then comes away with very little shear. That shouldn't effect your feel much but would add significant chain grip.