Stick with the pliers.

Since conditions on the water you fish can and usually do change by the day, you are probably better off just carrying some components and different bodies and blade sizes with you in box. From there, whip up a couple of the needed spinners and away you go.

I generally won't make up spinners until the night before I fish....or while on the river.

You can easily take pliers with you in the field.

Not so sure about a wire former. Besides, it's less crap you will have to purchase.

Or, you can be like Bob and make up about a 1,000 spinners of all different sizes, shapes, blades, etc. I swear his spinner box of completed spinners weighs 20 pounds!

Sadly, Bucket will lose all of those in one float down the river.