Marchant Dice router no thrust bearings?

[Web Goblin]

Thats even worse than I thought it would be. The only thing keeping that bearing in place is the ballscrew and if its whipping about it will start to pull the bearing out as well. The first photo isnt very clear but it doesnt look like there is any kind of nut or circlip holding the ballscrew on the outside of the bearing.
I would either buy or make two bearing mounts and get them fitted but you might have to get some lathe work done on the ballscrew as I cant see it already having threads for a securing nut.
Another option would be to use the bearings blocks on the insides of the gantry and have the shaft lathed to fit between the two blocks, some spacers might be required as well. The two blocks on the inside would remove any sideways play from the ballscrew.