If it turns out that the clear parts for the visible cockpit are problematic, don't worry about mine, mine will be painted anyway. The kit looks fantastic so far.
Elfin makes a YF-21 1/100 resin kit. It's a nicely done one too. Mines still in primer, maybe this spring or summer I'll get to it.
Double checked, the Elfin kits # is C131-400000. I would say, thats the kit in the first link.
I've used coat hanger wires to pin models before, but that might be too big for your kit. Any type of stiff wire or even plastic rod will work. Be carefull with that resin dust. It isn't good for you.