complicated......

What I've noticed in court is that it really does not matter who is right or wrong. What matters most is who is a better swindler. Who's lawyer is the best shyster. With that said your situation is so complicated that it really will not help either you or the X. It will only be a means of wasting time and money. The money that you could potentially waste will far exceed the benefits from going to court.

Try to work out an agreement and let sleeping dogs lay.