Too much is never enough!
Although I have occasionally given tools to friends if I've got more than I need of something and have just bought something better.
We use wood as a riser sometimes on a jack and almost always to spread the load on the area I'm jacking from. We work on classic cars and it's pretty easy to damage a subframe without spreading the load sometimes. However I wouldn't use wood on a stand, the idea is to get the stand onto...
I like it. I can see what you're getting at with weight saving, it's got me thinking now. I drive classic cars and usually have a couple of tools with me just in case, something like this would be just the thing.