I'm looking for another Sovereign to waterproof but don't want to spend a lot of $$$ ......Which older Sovereign is a good machine to waterproof ? ....Which model Sovereign would you buy and why ? ...... I don't want to screw up my GT in case of a problem , but I want a decent performer in Saltwater ....I won't be going THAT deep , but will build a box to protect it ..... Thanks in advance ...Jim