I recieved and inside tip yesterday.
If you would like a LakeMaster Chip for your Hummingbird GPS…Email this address… [email protected]
and request that Hummingbird make this option available to you…their customer.
Personally, I would be running a Hummingbird right now…if it would accept a LakeMaster Chip. 
BrianK, thanks for the tip. I am very interested in the Humminbird 797C2 SI Combo. I have been reluctant to buy one because it had not worked with my LakeMaster chip. Is there a way this will work, or do we need to petition Johnson Outdoors for this? I have sent them an email requesting this as well.
According to my “in the know source”…if enough people email them with your exact thoughts, they will make it happen.
Hummingbird, like all manufacturers want to sell more products….if there’s something in the way like…non compatability…it’s an easy fix. The trick is to convince them that yours and my wishes are worth the work involved. 
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