In reply to mike123:
Don’t forget though Glentress is/was partly what it is due to volunteers. I don’t know current position (since I’ve not been since 2020), but Glentress Trailfairies were active in trail maintenance, plus there are others who have developed new trails (eg off map ones) over the years.
A lot of the more current improvements, recent past and proposed, are I believe more a partnership of organisations trying to attract more events and tourism into the area. Having the UCI championships at Glentress this year has been a big driver to improving the area on a longer term basis, and I think further developments are partly to make it easier to bid for future events and for tourism/local economy, etc.
When visiting, remember, developments I think are ongoing till end of next year so there may (will) be some disruptions/ changes.