Oh yeah, I totally get your point about what a course feels like after 12/24 hours etc. Been there etc.
I guess as above technical isn’t the word, I’d say it’s more relentless – there’s nowhere you can just cruise with no real effort. Beggar’s bush and the quarry descent are all no-effort from the legs and you can coast them all fast enough if you know the corners, but you are working the upper body. There’s no-where you can really switch off your brain.
Two different types of tricky I guess, occasional hard to ride bits vs. a relentlessly fast/twisty course.
Still it’s all good, and I think it’s a good venue for endurance racing as it holds up well.
Not sure I could mentally handle the short laps riding solo though, I felt 10 laps was enough for me (I was doing pairs).