Grease coagulation would be the only issue I would be concerned with, and that would in most cases only effect the drag system. Easily remedied with a service, but I would caution installing a new aftermarket drag in any reel containing aluminum gears. Just installing cross/carbon sets in a reel with aluminum gears can cause issues and gear teeth rolling over. Those drags (stock) are a wet drag system and going to a lockable drag will defeat the purpose of smooth drag operation. There are ways to increase drag pressure a bit without risking gear damage. Aftermarket is not always the answer.....Dan