The Big 3-0 Secretary’s Challenge

This Challenge was to build a model using parts that contain the numbers 3 or 0. For example, members could use as many 3½” perforated strips (part â„– 3) as they liked, fishplates (10), 2” pulleys (20a), spring clips (35) etc. Luckily they could also use regular nuts, bolts and washers — but none of the long bolts.

Challenge models