Some cool ideas always great to see a fresh look into woodworking. I do not know why but when I saw your work I thought about some Kerei? tiles that are dirt cheap on SD Craigslist. I see you have a lot of bamboo and different materials. I have been dying to use them but they just don't fit our house right now. Search "reclaimed" in SD Craigs materials section. They have cool coconut tiles. I know, you have to see them to understand.
I was big into Hot Rod metal work and those tools make Festool look like dollar store items.
Get some wider tires and add a little camber, sorry just don't get that look. Never thought form should over ride function. Diffuser is cool.