One tactic that has help me make refinements to the building instructions is to host various building sessions where I can observe people.

The beer methodology has worked. As you can see here I have recruited two of my unsuspecting friends into building Squirrels by enticing them with a beer.

The young lady was actually booked and we were sitting at the pub near the window when the gentlemen was walking buy. I invited him for a drink and presto! Instant testing subject! You can tell how much fun this session was. 🙂