Full view of prototype II. Different clear 1/16-inch materials were used in an attempt to make quarter-hour points distinct, but difference is barely decernable.

Aluminum spacers are used to set slat-position. Accurate and convenient.

A slight difference in slat 'color' can be seen due to difference in material used. This is almost un-noticeable when tube is illuminated.

In addition, the polycarbonate material is orders of magnitude more balky to work with.

Full view of prototype II. Different clear 1/16-inch materials were used in an attempt to make quarter-hour points distinct, but difference is barely decernable. <p> Aluminum spacers are used to set slat-position. Accurate and convenient. <p> A slight difference in slat 'color' can be seen due to difference in material used. This is almost un-noticeable when tube is illuminated. <p> In addition, the polycarbonate material is orders of magnitude more balky to work with. <p>