Following with interest. I really hate saddles, too.
Mill No5 - X-servos could be mounted behind the column. Cast holes for the ballscrews and mount the motor and bearing block in back. 'Outboard' screw block up front. Saves a bit of space up front and protects the motors..
You might even get away with no outboard ballscrew bearings at the front if you up-size the screws enough and don't expect really fast rapids on X. Mounting the ball nut at the back of the table means you could get full travel and the ballscrew ends would never be exposed.
Downside is that you'd have no mold draft where the bearing blocks mount... maybe not a problem if you're just going to break the mold apart after the cast.