The Kuzma Stogi was DESIGNED --ON-- A LINN LP12.
To say they mate well, would be an understatement! Think about that for a few seconds. It would be difficult to find a better match for the table. Only an Ekos on a LP12 compares. Grab one if you can. Otherwise it's the Ekos, for at least twice as much $$! And some say the Kuzma/LP12 combo is better than the LP12/Ekos. Beat that.
This means the 'pivot to point distance' of the standard Linn arm is darned near perfect, it's off by maybe 1mm, and the mount is exactly the same. Use the standard Linn armboard!
The one issue, is that you will have to tape small block of some sort on the front edge of the table, to prop the LP12 lid up by about 3/4", as the bearing block is bigger than the Linn can handle.(with regards to closing the lid perfectly).
I've been using the Stogi on an LP12 since the Stogi was introduced. I'm on my third now..for some reason. Each time I sell it..I get one again!
I'm talking about the Stogi, not the Stogi 'S'. So you might want to consider the standard Stogi.