New 20 ounce tumblers available now! Forum donation credit with purchase. https://www.wildguzzi.com/Products/products.htm#Tumbler
I've not installed it yet. The next time the tank must be removed, I'll make the swap. Yes, using FI hose and clamps. I see no reason it should work its way off, once installed.
What parts did you order, Paul, and from where?
I use the green one of these Allows you to squeeze, pull and wiggle in a tight space all at the same time Go here http://www.ebay.co.uk/itm/CAR-FUEL-LINE-DISCONNECTION-SET-PLIERS-3-PIECE-PIPE-REMOVAL-PETROL-DIESEL-/222451245872?epid=1795061011&hash=item33cb20a330:g:yjAAAOSwPCVYBJnM about 7 quid on fleabay