I found a way to reduce the number of tension tools for all my locks. Rather then using 6 or 10 different tension tools, I've come up with a great way to use one tension tool for about 80% of my locks. All I need is to make one more and will be able to use just two *universial* tension tools for all my locks.
I have a large selection of tension tools commercial and home made. I'm not a fan of using tension tools on top of the key way. I prefer the bottom with a snug fit that won't slip and also provide the absolute most room for a pick.
Here it is...

this double end tension tool has two tips that I filed to a point or cone shape.

This allows me to use the same tip for may different size key ways and still have maximum room for the pick.

Making them is very easy. Try it and you will see why I call them "universial" tension tools! Right now I'm just working on the actual design, and not the cosmetics of it. I plan on making one more to fill the gaps I can't do yet. Then I will make them look pretty

All I will need is two tension tools, a small hook, S rake, and a jag rake and I can pick most locks. A 5 pc travelers set.
Give it a try!