Done most of it from Sanquhar to Moffat and Moffat to the top of the hill overlooking St Mary’s Loch. As said above nothing too technical, some good decent sand a fair bit of hiking.
My favourite is to get the train from Dumfries to Sanquhar and cycle back. We miss out the section from the radar station above Wanlockhead and ride down Enterkin Burn instead, join the Dalveen Pass Rd and then cycle along it to the next section of SupW over to Daer Res. There is a serious hike up from the Daer!!!! This may have changed since the Harestanes windfarm was built, not been that way since. There are a few new roads up that end of Ae.
The climb out of Traquair is a long drag through fields if I remember correctly and the section named Th Captains Road is/was a bogfest
If you like an “adventure” go for it, it’s what my mate and I used to do long before the joys of asking people on an Internet forum. Exploration is ace…. just too auld and knackered nowadays!!!!