In contemplating what my next tool purchase will be for my little shop might be, I've been considering a hardness tester. Until now, I've had to rely on the information from other makers' heat treat recipes to get somewhere within the goal hardness for my blades. I'm a little controlling by nature, and the not knowing for sure where my blades are coming in on the hardness scale is killing me. In my research, I've come across several portable versions of rockwell hardness testers that have got me intrigued. My shop is very small, it's tiny actually, and I really don't have room for a bench-top model. Having something small and portable would be ideal for my situation. I'm wondering if anyone has had experience using something like this? I certainly want a tool that will be reasonably accurate, so if these aren't very good, I'll look for something else. Otherwise, I might have to take the plunge. Any insight would be greatly appreciated.