If you have a mill , play with settings and mill wax . Dial it in .
If you use milling service , ask the center what they recommend and go from there .
Basic and good law for veneers from what I've learned is, Intimate fit makes for proper bonding and better light and color transfer between tooth/restoration .
So far a good prep and lost wax wins the day .
Lithium disilicate of some sort plus layering helps . Since it bonds good and easier then feldspathic from point of adjustability after try in .