I have both the Wissota and the Tri-Lie for my Blademaster Portable (SPB 850). I am in the same position as you, sharpen about 3 pairs per week for me and the kids. I originally bought the Wissota due to the price difference. I stepped up to the heavy-duty Tri-Lie after about 1 year, due to the quality difference. The Tri-Lie is definitely more sturdy and the clamp is much better and faster (even that speed is not an issue for my volume). Honestly, I think that the Wissota was fine and actually a better fit for the youth skates. If you are going to be sharpening larger adult skates more often, I would say the Tri-Lie. But for youth/junior skates and smaller sized senior skates, I think the Wissota is a great value and should be a good choice. Again just my personal experience.