Hi Ian....I understand what you say about the itching but I think
that's the micropore flange that causes it.I had the same problem some
years ago and still do occasionally.

I still use convatec two piece and it works for me.If you do have a
bad period of itching you can use a convatec flange made totally of
hydrocoloid matterial. This usually calm things down so you can return
to the normal system.

I wondered why you would want to change your appliance, is there some
other problem with it?

Stewart/Globey