Eight years ago, it was hard. Not five hours hard. I must be missing something simple. It is so easy on YouTube.
1. I put the blade in its little tunnel, wrap it around lower wheel as centered as i can.
2. Reduce tension control which drops upper wheel enough to get blade almost on wheel.
3. Hold blade to lower wheel while sliding blade mostly on upper wheel
4. Press down on tension knob which depresses upper wheel enough to slip blade on upper wheel.
5. Increase tension.
6. Rotate upper wheel by hand adjusting blade tracking to try and center blade on wheel. At this point, regardless of direction, it goes off the wheel.
UPDATE: My wife came to the shop. I suspected that I needed a third hand. Cutting just fine.