Got my 15mm Plastic Soldier Company 251 Ausf C Halftrack boxed set WW2V15003 along with some other goodies last week and put one together as a 251/10. These are a great product! I much prefer these to BF's resin model. There are no major issues with an out-of-the-box build - although you may have to fill a few small gaps in the upper and lower hull and you will have to replace the 'true to scale but flimsy for gaming' MGs.
I added scratchbuilt stowage ropes on the sides of the hull as these are seen on many period photos. I hung a crew compartment tarp, added a tow cable, fender markers mirror and rear marker light. Various PSC add-on stuff included using a few of their plastic infantry for crew helmets and kit.
I used a BF PaK 36 for the main gun and a MG34 for the AA mount; adding a AA sight, cocking handle and 50-rnd drum. I filled in the top holes on the barrel and re-drilled them out. Originally these are more grooves and make the MG look like a pulse rifle. I was going to use BF metal MG's but these too are easily bent. I anchored the butt of the MG to the side of the hull to improve its chances of survival. We shall see...
I love the detail on PSC Jerry cans! Although the carrying handle needs a bit of work. A small fix you can easily do is to remove the carrying handle altogether and glue in its place three plastic rods.