Tons of stuff you could add to it, but I have to stop somewhere. 
I know that there are smaller parts, but when you're trying to put something together with tweezers and a soldering iron, the 0201 is 99% impossible, and smaller stuff gets to 100% impossible. 
I find that 0603 and larger are fairly easy to deal by hand. I'm getting to be an old fart as well, so maybe someone with 22 year old eyes and rock steady hands might be able to use the smaller parts, I'll leave it to such folks to try. 
Alex, I've done things that depend on eBay products, but it seems I frequently get burned as they fade out and aren't available anymore. I'm depending on such modules less and less and sticking to parts that I should be able to source for the foreseeable future.
