Thank you, Terry
I was considering wire clamp tool, but the SS webbing has to be contained and the wire would not do that, only ferrule like this one. This jig was the quick and dirty solution, if I had the time and patience I would use the same approach, only massive steel ring instead of the square tubing (it got deformed in the process) and "contact" blocks instead of just bolt ends to crimp the ferrule.
Or I can assemble it and take it back to the shop for the final crimping, probably the easiest way:)
I have 1500 miles to figure it out - till the next oil change. If my vanity wins, I will make another set of hoses, this time with better looking crimps and replace these one more time.
The tube cutter is quite an original idea, I like it. It would be a challenge to hold the ferrule against it, but with enough play time, anything could be solved