Some progress to report. Today I removed the small tubes from the battered donor Carrera CV2A10 case which guided and held the rep chronograph pushers in the case. I first heated them up using a soldering iron, and then tapped them out, and out they popped 
What was interesting once these were removed, they both have tiny O-Rings, which obviously aid water resistance. You can just about see in the photo below..
Photos of case holes now with the tubes removed...
Now onto the good news.
If you have been following my progress on this build you will recall me planning to tap/die the tubes I just removed so I could screw in the genuine threaded pushers (Red Start/Stop gen pusher pictured above), and then refit/bond the tubes, and gen pushers into the case.
After checking the above gen pusher against the hold left in the case after tube removal, I am happy to report, I will no longer need those tubes, the threaded part of the gen pushers are 0.8mm bigger than the holes, so I can now tap the thread directly into the case, thus making a much better water tight fitting. Once done, i will use a bonding agent with PTFE properties.
And here's a quick photo of my work bench as I finished work today
What was interesting once these were removed, they both have tiny O-Rings, which obviously aid water resistance. You can just about see in the photo below..
Photos of case holes now with the tubes removed...
Now onto the good news.
If you have been following my progress on this build you will recall me planning to tap/die the tubes I just removed so I could screw in the genuine threaded pushers (Red Start/Stop gen pusher pictured above), and then refit/bond the tubes, and gen pushers into the case.
After checking the above gen pusher against the hold left in the case after tube removal, I am happy to report, I will no longer need those tubes, the threaded part of the gen pushers are 0.8mm bigger than the holes, so I can now tap the thread directly into the case, thus making a much better water tight fitting. Once done, i will use a bonding agent with PTFE properties.
And here's a quick photo of my work bench as I finished work today