You likely are going to have to drill 3 holes in the Aries plinth and add a bush to take up the gap ( VPI used to sell them ) but the bush is only for centering the bearing, it is not actually required. The Aries has a compression fitting - no screw holes required.
Also likely you will need a new pulley as the 2 platters are mated to different motors - 300/600rom.
In my experience inverted bearings do have some advantages if they are designed well.

