Regarding the Lowrance Eite-Ti models--are they a Gen 2 HDS interface and OS in full? I've run the two side by side , and, with (almost)every page I accessed, the interface and options available in each sub-menu appeared to be the same. The only difference I can notice is that the Elite is still single card slot, and the HDS is dual. This is comparing a current model HDS to an Elite Ti, BTW--Some say the Ti is a gen 2 HDS, others dispute this.
So, I am thinking of going to a second unit to work alongside my Elite-7 CHIRP. I have it working really well, IMO, with the right transducer, but the page-sensitive menus just drive me crazy. I hate having to change pages ( with buttons) to do something simple like zoom the plotter or manipulate track. Plus, I want bottom lock, so the plan is to use the Elite as a plotter only. I see two options for my price point--the HDS-7, or Elite 9 Ti. Apart from the dual card slots, and the fact that the HDS is ( probably) a generation ahead in OS, what are the differences?