Good to hear. Yeah I just wouldn't even bother with that store anymore. That owner was so wrong on so many levels. I mean she/he actually believes a blood test wont show anything??!! A blood test in reptiles is about the only way to get a thorough check up. It gives proteins, uric levels, calcium etc. I had one done on my bearded dragon. They aren't cheap but they give you a complete assessment. As for the vertical lines, some boas do get those, usually from being a bit fat. Also I have read that sometimes when a boa sheds, if it sits in a tight coil for a long time, the scales will crease because they are soft when they first shed. Also dehydration I guess too but I would assume the lines would be all directions, not just vertical. But regardless, good to hear he got a clean bill of health. Also good call on lowering humidity. I keep all my snakes around 50-60% humidity even during sheds and they are all fine. High humidity will promote bacterial and fungal growth which can lead to fungal RI. Curious which vet you used. Was it Kamaka Exotic Animal? I heard she is pretty good. I use Bird and Exotic Clinic of Seattle with Dr Bennett. But I'm always ears to hear about other reptile vets.