Build until you are happy with gel layers, and cure for _ minutes. You should have a thickness of a ______________ at the free edge, even c curve, apex, if too heavy will weigh tip down and cause lifting and prone to breakage, if too thin will break under pressure. Apex or arch, the highest point of the overlay, should be placed in the ________ of the natural nail, for support and balance, if it is flat the weakest point will be in the middle of the nail. If the product is applied too thick near the cuticle this will catch over time and cause lifting