I'm interested in getting an older 726 and have a few questions about the various models. I understand that the 46 model had a light bulb smoke unit, some sort of horizontal e-unit with spring return, and removable bottom plate for access to drive gear and axles.
1. Is there a modern smoke fluid that is acceptable to use. Not interested in modifying the smoke unit.
2. How hard is it to keep the horizontal e-unit operating well.
3. What are pros and cons of removable bottom plate? Seems like it would make it easier to work on?
4. Any other pros and cons to the 46 drive train?