Bike pedals used to put a metal screw cap to protect the bearings from contamination. Now, instead, use the plastic plugs, which are often lost. Rescue plastic or nylon tubes from medical bubbles. Such substitutes being kept quite steady.
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SWITCH FOR GROWTH
If necessary, almost any switch can be very simply converted so that they could be used by both adults and children. This will require a strong nylon thread and two balls of different...
Lever to help
Sometimes a load lifted by a crane beam or winch (when replacing an engine in a car, for example) needs to be lowered slightly to the side from the suspension point. In this case, an...
