I used these on my last build and they will be a "go to" item for me in the shop from now on. I bought about 36 on sale.
The nice thing is that the mod is reversible, so when you are doing a build, make up the "Jimmie Clamps" and they are very useful. When you finish, reverse the mod and you have several dozen clamps for routine shop use ... I have always had a couple of spring clamps around, but having dozens of the larger ones really comes in handy and I use them generally a lot more, as they are sitting right there.
I made up 36 of these before starting my current, 1st build. They work really well! It's been unusually hot here this summer and the Jimmie Clamps have made it easy to quickly place full length strips before the glue tacks off. It's not often that a specialty tool is so inexpensive, an added bonus.
You will like them, where you use staples or not. To me ? They take the place of another set of hands, when laying up the strips !
I bought new tubes. They were the smallest diameter I could find at Walmart.
Be sure to leave the plastic tips on the clamps. When you stretch the tubes over the ends !
I hope to build this Spring. Can't hardly wait ! I picked up a bunch of Kevlar, pretty cheap.