I asked about a bit on this and here is what I've been hearing-
If need be,,, "Smart Tabs" are the way to go. They mount to the transom and not the motor. Like a trim tab, one each side, but they are raised or lowered with a lever for troll / run.
One guy said in order to raise / lower quickly you need to order a optional mounting bracket. He also mentioned making a longer pivot arm from flatbar aluminum from Home depot to make a longer link for full raised to flat down.
Seems they are around $100 - $125 per set.
Both had trouble slowing for trolling.
1 guy mentionbed he couldn't get down th 3 mph. With the tabs he was down to almost 1 mph. (not sure if land / water speed or how measured).
Both said the trolling plates were junk! Go with the Smart Tab.
Like I said, I've not tried them so no first hand knowledge is available. Maybe a search will show something?
At my burn rate on fuel,, I'll stick with the electric locked in front and use the main as a tiller. I can really slow down that way.