Just spent 2 hours on a crown prep that the lab will probably mess up anyway

Perfect margins, perfect reduction, perfect temporization. Took me 2 hours because I wanted it perfect. Sent it to the lab with detailed instructions, photos, everything. I already know they're going to call me in 2 weeks saying "we need to remake it" or deliver something that doesn't fit. It's always something. Why do I even try to be perfect when the lab ruins it anyway?