Hi Fergal,
To be honest we would normally just ride the loop I put up earlier, the descent down from the eastern summit to the road is superb and fast. You can make the start of the descent more technical as there are a couple of steep options.
If you don’t feel the need for an actual route you could spend a couple of hours dicking about on the eildons, I did this and it’s quite good fun. what I did was park up in Eildon village, there’s a track that’ll take you to St Cuthbert’s Way, from here I basically went up each of the hills; small one first, then up the middle one this was a push. Going down the other side there is a very steep rocky path. Then up the eastern hill and down again…
We’ll all have different ideas of technical, mucking about like this gives you the chance to try the trickier bits. The loop I posted, has it’s technical bits – one being a rooty climb for example..