The board is already small at 1.1 x 2, and I happened to have a 5mm LED footprint handy... 
Diptrace is great, but as for any such tool, there is a learning curve. You're going to find out the hardest part is finding parts you don't have in the library and creating new ones. 
I've used it for perhaps a couple dozen boards so far, so I've built a library of many of my commonly used parts. To get the 3D views, you also have to hack the 3D representations of parts, sometimes I grab a totally different part 3D view to "build" the part I need.
