Wow, i've never encountered such a bad t-kit even with the older fujimi/aoshima kits. They are soo much older than HD kits and not as bad. I agree, Hd better invest in some better resin. I was eager to buy a kit from them, not anymore. With so much money, id rather buy a scale production,scale motorsport or even a studio 27 kit.
Good luck on this build. The easiest way to make those parts to fit is cutting them in the middle and adding styrene in between until its big enough. But in your case it might take even more effort than that to make it fit.