Since there's not been an update for a few weeks, I thought I'd let people know what's in the works.
The next major tutorial is another spring cover. Actually, it will go over several types..
This will be a very comprehensive how-to; there will even be printable patterns
I've also been experimenting with different materials to balance durability, weight, and style
Here is a new material I've found. It's a heavy duty textured vinyl that seems like it will hold up very well:
It's cheap, very lightweight and quite durable. The only minus is the fact that it won't absorb impacts as well as a heavy bike tyre.