We're having daytime highs around 89 degrees and nighttime lows around 72 Flounder. Too hot and humid to shoot during the middle of the day, but tolerable for morning and evening sessions.
The weights shown on that picture are not correct. They should all be in the 300's, not 400's. I fixed it in Photobucket but the corrected copy is not uploading here yet.
The scale automatically sets to 0.0 when you turn it on. If it does not, all you need do is turn it off and on again and it self corrects. The key to getting good readings is to set the bullet down gently in the center of the weigh plate. I've checked its consistency by alternately weighing the same two bullets a half dozen times and always get the same weight for each. It's an impressive scale for something so inexpensive.