Just noticed this thread. The Kuzma 4Point needs no introduction for those who have read about it and perhaps have heard it. As a Kuzma dealer I haven't installed a 4Point on an AC Raven but have successful installations on tables other than Kuzma including Acoustic Signature Final Tool and SME 30/2. The SME was a couple of months ago, and the customer is happily using a Lyra Titan i on it. A current news item on the Kuzma website features a couple of photos of his installation.
Although you didn't mention it, another choice is the Stogi S 12 VTA, especially with the silver/gold Crystal wiring. Like the Graham it is a unipivot design; its performance comes remarkably close to the 4Point at much lower cost.
Although you didn't mention it, another choice is the Stogi S 12 VTA, especially with the silver/gold Crystal wiring. Like the Graham it is a unipivot design; its performance comes remarkably close to the 4Point at much lower cost.