My understanding is that if you want to network with your Minnkota and follow contour you need to have Lakemaster. That made my decision for me.
I didn’t bother with the plus.
I am curious about what the zero line card will do for me. Don’t have one. Should I?
I think the zero lines card (autochart live) really comes into play on rivers. I cannot begin to count the number of areas on P4 that are nowhere near accurate on many of the big name chips. I use autochart live while trolling P4, constantly fine tuning my maps. Luckily my FW likes to go for “boat rides” but sadly isn’t really into fishing. Most of these rides are my mapping runs. One thing I found out quickly is that it is crucial to know the river stage for your area at the time of mapping. Then in the future, just use the offset feature for level adjustments. I’ve got probably 20-30 hours of mapping one one card and it shows no signs of being full.
If you primarily fish popular lakes, most of the big name chips seem to do a nice job. I wouldn’t necessarily NOT use autochart in these situations, rather it wouldn’t be as big of a priority.