Deadlifted for the first time this week. Was trying to work on form, so I went 95x6, 115x6, and 135x6. It's not a lot of weight, but I think my form is pretty good. I think I can go way heavier. Right now I'm using an overhand grip with both hands. When my hands start to fail, do I then switch to an alternating grip? At what point should I worry about using a belt? I want to try to go as heavy as possible, for as long as possible, without wearing a belt.