Either for fun or for production use? There's so many different things I like about different mowers, yet some ideas I've never seen utilized in mowers, I always wanted to fab up my own mower. Start with just taking parts of different mower you like and make them work. Then maybe go from scratch one day. I would love a stander type mower but the front portion of the frame and deck flexes like a walker deck. Make the decks interchangeable with the same tractor, etc. Have thought of a mower that without the deck will still stand upright like a Segway... You just back off of one deck and up to another deck or any attachment you want. Maybe a sprayer/spreader attachment? Snow blower? What parts would you take off what mowers to make your own? I need to learn to weld... MErica.