20000 miles in, cleaned them out. The car no longer "hunts" for the right RPM on cold start so that's a good sign. I'll take her out later today and do a bit of a run down and see how everything goes.
Didn't disconnect the TBs from the harness when cleaning. It's doable and safe, if not a slight pain in the back due to leaning over the side of the car the whole time.
Towels were filthy afterwards. Towel on the left was used to wipe off the inside edge of the manifold and then stuffed in to make sure none of the TB cleaner splashed in while I cleaned the TBs themselves.
Capture.JPG