@Jay
I have a Brooks B67S sprung saddle that I bought of ebay several years ago. I have always adjusted the tension bolt whilst the saddle remains on the seat post in the seattube. I do small increments of quarter turns to find the right tension comfort for my bum. When my seat bones begin to feel sore and uncomfortable, it is time to buy new padded bike shorts.
I occasionally use Obenauf's HP Leather Conditioner to help the leather retain its complexion from not drying out, especially in the warmer summer months here in the PNW where I live.