I partly agree with Floyd (btw I also use Tush 400 75% mast and like it very much). Depending on your intended use/sail type, there maybe be significant improvement though. Especially with bigger race/freerace cammed sails, I think it's usually the case.
Matching bend curve from another manufacturer (although IMCS is nominally the same), can be a nightmare. Have you seen this, please help if you've used an Arrows: