Spring punch

I was sent a Spring Tools centre punch and nail set by Phil Gregson of Chicago Brand UK Ltd. I suggested a comparison of the spring centre punch versus the other centre punches I had to hand. The following is
Motor Chassis – Design and marking out

When designing the chassis for the Topsy Turvy Clock I needed to think about how the components would fit on the brass sheet but also how I would go about marking out. Typically when dimensioning a diagram you use a