Even if you use an electric jigsaw, it is usually at the curve sawing any moves on her trail the jigsaw. However, here is an easy way to get perfect circles with jigsaws device — be it a machine or hand tool: to move is himself the material. For this, the workpiece set on the base with the axis center of the future circle: the saw blade, entering the rotating workpiece, will certainly withstand the path of the planned circle.
Recommend to read
ELECTRONIC “MATCH”
They say you can't save much on matches, and yet... A simple and practical electronic "match," the description of which we offer to readers' attention, will free you from the need to...
FROM THE BARREL — STRETCHER
They can be made in just a few minutes. For this you need to saw off part of an old metal barrel and attach it with bolts to handles (e.g., spade handles). Yu MACHALA, 13 pet., Lviv, Ukraine