I have the OMNI REV 2 which I assume is the 2nd gen of this model.
Bought this cause I thought it'd secure the longevity of my OMNI, but is obsolete in its design. The 2nd puck doesnt match the design of the back cover of the Omni. And you have to unscrew this screw that sticks out of the side spindle holds the thing in place. Even with just 1/2 of the puck it assembled it made the platter moment more noisy because that side screw I mention on the spindle would rub on the puck installed.
You had the very 1st OMNIs in production I would recommend getting this. Buut for those that are pre ordering now, I would not get this. Headache Sound has already stabilized the spindle for you. Just buy those flat head LG or Sony Batteries for the battery mod and you're set my G.