I thought there were many. Here are some
1. Making splash guard from softdrinks plastic bottle. They are expensive and costs about P400 each
It is free when making them from used PET bottle
2. Repairing spokes converting them from J to straight pull using pliers and inserting them at hub holes
3. Partially truing a wheel. The correct tightening is counterclockwise
4. Retightening a fork top tube extender. This is what he mechanic did to the Pinarello top tube
when it got loose from the Daraga 400 km ride
5. Installing a goat link to SRAM red rd so that the rd can accommodate 11-36 cogs
6. Cheap saddles are good for your butt
FB posts: senior rides, Jorgeus George