I was looking into purchasing a HDS 5 to put on the TM and link to my HDS 8 at the console through my LSS-1. Are there any suprises/complications I should know about doing this? Any recommendations from someone who has this setup now? Aslo I suppose I will have to purchase additional map cards for each unit correct? Also what are the opinions onthe HDS 5? is the screen size going to be adequate enough to see structure detail?