Ron,
In using the adjustable whisker pole we follow the same process you outlined. we also found that setting the pole length prior to use reduces the stress of trying to get the length set along with the pole setting process.
The issue with the adjustable pole we use is that when adjusting and locking the pole the jaw ends can end up in different orientations to each other. also, close attention needs to be given to locking the pole well enough so it doesn't un-extend itself after its set.
Another feature I added to the boat is mounting chocks to the seat legs for the pole to be kept while not in use.
I hope this helps.
Tony Cannone