i'm going to attempt to replace a toilet tomorrow. the tank cracked, i tried sealing it with plumber's putty but the crack sort of goes around the bottom curve of the tank and when i started to fill it back up with water, the water just lol'd at the putty and leaked immediately. i looked into replacing only the tank, but the toilet is super old (stamp says 1981) and i think i'll just get an entire new toilet. please rank difficulty out of 7. it looks like it should be a 2 but i don't know what i'm going to find under the current toilet, due to the age of the house.