Right now the mod will double the XP Requirement for every single level that is gained on a tool. What I would extremely love to see is an ability to change that. For instance: When a user enters 1.05 in the config the level requirement will go up by 5% for every gained level (ex: level 1 requires 500 xp, level 2 requires 525, level 3 requires 551 xp). This would allow for much greater customization and would allow servers to make levelling less or more grindy.

Hope it gets added :)

Doh! I think I submitted a similar idea. A lot of XP tables in games use something like the fibonacci sequence.