Off course it will be of much help if you are an RC modeller and you know what products are HOT.
Some of products for instance:
- custom build motor mounts for various electric and piston engines (aeroplanes and helicopters)
- custom build controll horns for control surfaces on large scale aeroplanes
- custom build servo trays for large scale aeroplanes
- various parts for electric helicopters
Why I suggest tiny parts for RC modellers? because you dont need much of materials, but prices on tghe market for those tiny parts are quite reasonable.
You can advertize and sell allso on Ebay.