Every Father's Day I always have the same issue, what do you get for a Dad that already has every conceivable tool and gizmo you can think of? (mind you, I have also noticed that my kids have a similar problem).
Most years the situation was solved with the purchase of a gift card from his favorite tool emporium, but even that gets a bit stale after a couple of years, and you end up back at square one again.
In the past couple of years, my Dad has started to have a few mobility issues which could be greatly helped with some regular exercise of his legs.
A neighbor of theirs recently got an elliptical trainer for this exact same purpose and they claim that it made a world of difference for them. Grabbing onto this as the perfect gift for Dad, I did some online shopping for something similar.
After quickly noticing the $500 - $1,000 price tag, I quickly had to do a bit of a rethink. While my father is certainly worth the cost of such a machine, I did have a bit of issue about paying that much for what was basically a fancy box with pedals sticking out of it. - effectively a fancy unicycle that doesn't go anywhere.
From what I could gather, the basic premise of the trainer is to provide a low impact way of giving the benefits of riding a bicycle, including providing a measure of pedaling resistance to build leg strength.
It was then it struck me that I already had the building blocks for building my own elliptical trainer out in the parts bin that is my shed.