Learned collective a few questions on the subject...

Moving image types...are there any pros & cons to this system, I believe sometimes the recticle can appear one-sided in some cases? are there other alignment issues? are all of them marked 'moving image' and if not how can you tell without cranking the adjusters right over?

Reticles... if one breaks, is either a DIY or professional repair viable or does it usually scrap the scope and if a DIY repair is possible does the loss of nitrogen (is there actually any left in a 20-30 year old scope?) cause issues.

Anything else one should consider?

Apologies about all the questions, it's just I'm only just beginning to appreciate some of the better older stuff