Thanks for the kind words.Very good videoinformative step by step instructions! Can I just ask why you and so many others use the WSKO freehand instead of with the guide?
I use the WSKO freehand because it makes it just like a little belt sander; the skills are transferable to larger belt sanders, like a 1x42 for example. I see the following benefits of using it freehand:
1. Greater range of angles. You can literally grind flat to the face of a blade, or directly into the edge. Effectively nearly 0 degrees to nearly 90 degrees. Grinding at nearly 90 degrees is actually very useful for blades that have deep chips. Cutting the chips off by flattening the edge can make it easier to reform the edge. Or any angle in between that you choose. It's just more flexibility and choices.
2. Selective Grinding. As you saw in the video, I can work on any section of the blade I want to, in isolation. I don't have to draw the whole edge through; I can touch any part to the belt for as long or short as I want. You can probably do something kind of like this with the guide in place, but it's going to be awkward trying to position the blade, hold it, and turn the trigger on. Do-able, but not optimal in my opinion.
3. Two Hand Technique. Using two hands really gives you control over the blade. Especially near the tip.
4. No grit build up to scratch the blade. With the guide, grit can get trapped between the guide and the side of the blade, making scratches. You pretty much need to tape off any blade you really care about using one of these systems with the guide. Honestly, it's a good idea to tape off any blade you're really concerned with using any type of system, including stones. Using the WSKO freehand just reduces the probability of scratching the blade up because there's no guide to catch grit and slide on the side of the blade.
That's most of it; at least for me.
Brian.