Seamaster De Ville (166.020SP / 565) - replacing pendant tube myself

Thanks for the responses to my previous post re the ordering of crown, stem and tube.

I'm wondering if I can fit the tube myself, by carefully tapping the stem in using something like a nylon mallet, without removing the crystal and movement?

I see that there's a step in the rim of the narrower end of the tube, so I'm wondering if it's not possible to line it up correctly without removing the crystal and movement.



Cheers, Michael

Many thanks for the advice, will try find someone local to help me with this.