Glad you enjoyed Glen Strae Andy; I'm very fond of it.
Meanwhile, today I took a trip up Glen Orchy to check out my old route. First thing, the bridge at Catnish isn't just closed. it's gone, a late bridge, an ex-bridge. Now I think about it, I remember someone telling me that it got badly damaged by debris washed down the river last September when the Orchy flooded to unusually high levels. Anyway, it's now been completely removed and the car park/picnic area next to it no longer exists. A consequence of this, however, is that my route through the forest from Eas Urchaidh to Catnish has been cleared of undergrowth and fallen trees and is therefore wider and very easy to walk along. Its start point about 100m up the track from the bridge at Eas Urchaidh is now very clear and the walk from there to Catnish is a gentle, undulating stroll. So if you or anyone else is thinking of doing that route from Bridge of Orchy to Dalmally then there's no problem with that section. Once you reach the cottage at Catnish you still have to work your way along between the fence and the river (the gate to the cottage grounds is locked) and, as I said earlier, I don't know what the path through the woods is like after Catnish since it won't have had a lot of use. I didn't got that far today because my ancient 16 year old dog wouldn't have tolerated it. The track has been "improved" because it's now the only access to Catnish Cottage which, I notice, is for sale.
This is what did for the bridge (picture from the Oban Times) :