I have a new (used) hds 7 gen 1 I bought from a buddy. I would like to add structure scan but I dont know what all is required for the upgrade. Can someone help me with this and how much can I exoect to spend for this. Additionally I moved my elite 5 hdi to the bow when I installed the hds 7. The transducers are side by side on the transom. The elite is set at 83 khz and the hds 7 at 200. Should that take car of interference issues? I cant mount the elite 5 on the t/m because I am running an i5.