I'll be getting an Excal within the next few months & have been wondering if there is a generally accepted time span for getting it serviced??? I'm talking about seals...maybe around the controls & cable fittings...I've downloaded the manual from minelab & haven't seen anything refering to timeframes...I plan on taking it under no more than 30 ft. with the average around 10...99.9% fresh water... Has any body had any issues with the unit leaking & is there any way to tell if you have a problem before it would fry itself? I've thought about getting a used unit but am pretty hesitant because of the issue of possible leaks & the unknown issue of seals....I know most of you here don't dive but believe you use your units a lot more...All input is greatly appreciated...thanks...HH...TT