metalworking pillar drill experiences

[routercnc]

I'm thinking about adding a few features to my pillar drill - DRO, quill hold, better depth stop. I've got some ideas to make a nice package on the left side of the machine but before I do can anyone tell me if I take off the aluminium depth stop held on by 3 bolts will the spring and/or bearing fly out never to be put back?



The instruction sheet that came with the drill shows a fairly poor photocopy of the internals.

Thanks