Dave , apologies if I have already told you the following.
As you know my stricture kept closing up, after one attempt we decided to try progressive home dilatation. This involved insertion of a number 14 catheter then removing it and inserting a 16, 18 or even a twenty. It did keep the stricture open longer and kept me away from theatre and a full dilatation for a longer period.
Hopefully your next procedure will sort it.
As always be gentle with the catheters.
Thanks Chris