barry,
With forty years of experience as a professional working on MGBs, amongst other Brit cars, I can tell you that you did not create a potential failure. What you created was and absolute certainty that the hose will indeed fail. I've seen it so many times in so many ways I'm virtually haunted by it. Take that cylinder and hose off and do it the way it says to do it in the manual. I know how strong the temptation is, my friend, as doing it the proper way is a pain, but this shortcut will be more painful in the end, for sure. Enjoy.
Motorbill
From Lola to Land Rover, If it's British and has wheels, it's likely I've bloodied me knuckles thereupon