Make tacklebox have an amount of spaces equal to the number of bait items at or below the level of the level of the tacklebox (or perhaps ilvl or below if any bait goes above 50), and have it be unable to hold items above its level (or above its ilvl, if previous note does occur). Make it give stats, and lower the stats on Rods to compensate for it, just like they do for the other gathering classes.