More or less finished with my lower leg prototype. As with the forearms pieces, I've pre-assembled it using masking tape. I bought some combat boots for cheap at a surplus store to use with this project; I stuffed one with scrap foam pieces to make it stand up so I could work on the prototype.
Still a little to add here, a little to shave off there, but I think it's ready to duplicate for the other leg. I originally did the shin guards in 5mm foam, but thought it looked a little anemic (and I got the cutout for the detail work too big), so I re-did it in 10mm. I really like how the beveled edged came out using the 10mm stock.
The only thing I might change at this point in the white bit right above the foot. From the side it should flow more with the curve that comes up from the heel.