Sorry for the mega-bump, but i have something I thought that would be very appropiate for this thread.
I've had this idea for a while but I just put it to action last weekend. I used one of my brother's oldddd skatedecks, hence the stickers and dirtyness. I had to get longer deck hardware because the wood was a lot thicker than the aluminum plate. It's 5.5 inches wide, and on a kukk cruiser frame. The weight is real close to the stock plate, at least from what I could tell, I didnt weigh it or anything. The concave is so gnarly on it, and the added width is nice (to me). This is the widest deck that I know of so far...
Here's a couple pics in comparison with the stock 5.0 plate:
...and a couple of it on my scooter:
Let me know what you think.