Together with an overall check & replacement of some parts, I had my rear shock dismantled, arranged and rebuild. I considered it would be enough for the km left to my bike.
It turns out it was a good idea, because there was a part inside that was half broken, so I was in real risk of "getting seated" all of a sudden!
In its 185000 km, all I had done was to replace the spring for a Hyperpro one some years ago. According to some expert, this stronger spring shortened the life of this half broken part.
This part is an aluminium cilinder, like a pot withoud lids, with two circulars "carvings", one inside and one outside, where spring hold, and serve for the preload adjustment.
This expert crafted a new part, but with the carvings at different height, so that there's two thinner places instead of a one much thinner one. With this design, position 0 of preload adjustment is equivalent to position something in the old one, but this is no problem considering my "over 60 kg" weight
To summarize. If you have stronger springs, you are risking an internal break of the schock in the long run.
Greetings,
Josep