Swopping the Giant Dropper from left to right side as have a dodgy left thumb. I made a silly error and left the outer about 3 inches into short such that a big barspin wraparound would cause problems.
No bother, I have spare inners and outers, should be a doddle…
An hour later its all sorted, with a new internal outer 😀
Final solution was new outer gaffer taped to old one, crucially with an inner through both to keep stiff and combined push and pull from the downtube opening. Tried from seat tube first but couldn’t get it round the bb bend and was pulling as hard as I dared. Going from down tube and pulling up with fair force got it past the bend !
Press fit bb, for which I have no tools, removal of which would have made it very simple 😳