Thanks so much for the comments.
Oldlady - Thanks for the advice, I think I will change to that syringe method. Perfect.
BigLou - about the giffin grip, I use it for vases as well as some quick trims it just goes fast. I do most of my trimming without. I like it, but understand when to use it and when not to. I am very confident with tap centering if you wanted to see some of my earlier videos. I would love to try woodfire, but I do not have those facilities available to me. I do cone 10 reduction which makes for a great porcelain product as well.
KoHaku - I do not let them get leather hard. They are still pretty wet and can easily shape or pull if needed, it takes a very confident / light touch. Which I do in this video. I have never tried waiting until leather hard, not sure it would turn out the way I want it. I do not want to see any seams.
In the video I said the walls were about 1/2 inch thick, but upon reflection it was closer to 1/4 inch. The key is the shape so that there is strength when you move and attach them.
Thanks to everyone for the comments.