So I think I'm going to pull the trigger and buy a 20HP Tohatsu outboard short shaft this week. I have an older 14ft aluminum boat that I'm not crazy about but I can't afford to upgrade the boat just yet. I plan on keeping my new Tohatsu for many years. If I later buy a different boat that needs a long shaft, can I convert my outboard to accommodate it? How much does something like that cost? Thanks