BUT! I was actually thinking more like how ponies sit when they're flat on the ground. The hind legs tuck under and forwards, and the forelegs lie on the ground, also extending forwards. I modded your template a bit to get at what I mean: [link] An original vector of what I'm trying to make is here, from another lovely deviant: [link]
But I'm really not very good at these, and don't have whatever drafting program you use to make the models, so the colors and whatnot are - of course - all wrong.
Like I said, you could probably just use Lyra's forelegs with the different colors, but the hind legs would have to be tweaked a bit.