I picked up my tank this morning and i am happy with the condition. I paid 100$ and he gave me some wood so i can burn it after i cut the doors in the morning. I want a double grading and i measured the doors and tryed to use most of the tank if you can see the the markings do you think i can fit the two gradings or do i have to go lower or should i go higher from the bottom. I didnt start from the middle of the top i started 4inches from the middle pad eyes. Then came down. past middle of the tank to the weld. Filling up with water after presurewashing the inside at the carwash.