Nothing makes it better!
I own a Chris Kelley X1 and it is accurate aside from a few scratch build greeblies,..i even think his tie ball dimensions are more accurate than the niesen version,that is if Steve used his dimensions from his tie-fighters to master the x1.
If that is the case then his tie ball is slightly undersized and the Chris Kelley x1 is more accurate.
The x1 mastered by chris kelley is now cast and sold by korbanth and it seems that he uses or used a type of resin that causes problems with paint adherence.
I am not sure he still uses this resin or if something else causes/caused this problem but if he solved this problem than you can't beat the price of his current X1 offering,.it's a steal!
I am not sure if korbanth includes a metal armature rod but that is a must since the wings are heavy.
My version of the C.Kelley tie has wings casted by Mike Salzo(which i think also casts Steve Niesen's x-1,i am not sure)so all the details(diamondplate solar panel) are there and the warpage is minimal.
I am not sure if korbanth can pull this off,but if he can then i believe his X-1 is the better one for accuracy and price.
That just my opinion.