Thanks, guys !!

Man I hate ambiguity Rofl .... I mean, just exactly WHAT "general software & performance improvements" are they talking about

The first part, the coastal overlaps/gaps, doesn't affect me ... so that's not a reason for me to update.
The second part ... depth color shading, seems to be exclusive to Navionics maps, so it doesn't affect me (yet). I still have to do a little "on the water" testing, without a map card, to see if I think it necessary to purchase the $100+ lake map card.
The third part, "general software & performance improvements", sounds important ... but if updaters can't really tell any significant difference, I may just wait & see if another update comes out anytime soon.

I do like the idea that "improvements" can be made with FREE updates, though I do wish Lowrance would be a little more specific on what they were or what differences I would/should notice. That is, of course, IF they CAN divulge that info ... and not in "rocket science" terminology Rofl

... cp