angular contact bearings - back to back, further apart

[dsc]

I've decided to ditch the double row AC + floating bearing approach and simply use two single row angular contact bearings mounted back to back:



Am I correct to think that the bearings need to be a slide fit on the shaft and a press fit in the housings? preload will be via top cap, with the mounting bolt torqued to ##Nm, not sure on the value though. That or I'll use a locknut with a side grub locking screw.

I'd like for this design to offer as much stiffness as possible, will it work, or is there something I'm missing?

Regards,
dsc.