Hero XP Required Table Character Limit

[Kaijyuu]

So, the regular XP required features aren't suited for my map, since they're exponential. I want a curve that flattens out after a certain point. As such, I have a fancy pants logistic XP curve I made and want to implement, but there's a problem: the Hero XP Required Table seems to have a rather limiting 1410 character limit. Is there any way to expand it (by, say, directly modifying the text files in the map)? Or is the character limit a hard limit?

If I can't do it this way, I'm already triggering XP gain and can simply store the "actual" XP in a variable and level them up when appropriate. That takes information away from the player though.