Hey, ..well thanks for checking us out!
I agree that a length of wire will work in a pinch. Those oscilloscope probe grabber tips are designed to attach to #16 AWG wire ..and not much else. But.. that's not ideal, right?! Here are a couple situations we ran into:
1. You are working in a cabinet with limit space, you need extra nimble fingers to get wires wrapped around bolts and securely fastened.
2. If your test lead is smaller than other wires in a DIN Rail type block.. then it just pulls right out!
3. And, wires have other problems.. like they can get into places you don't want them to and short out your system.
As far as hacking a crimp terminal.. if you got the time and skills, I say do it! We love the DIY kind of hacker community. Or,.. if you like our product but the price is too high for you. We are in the process of making a how-to tutorial on how to make these guys (probe2bolt adapters) for yourself at home. You just need to buy a sheet of brass and some cheap tools that you can modify. The only downsides to the DIY version is that the adapters won't have a professional cut and they won't be nickel plated.
Thanks again!