The Terrova mount is up at the bow about where the Motorguide name is on this trolling motor. There is one small panel on each side, trolling motor switch on the left and switches on the right. Neither is large enough to get up to the elbow even on an 11 year old. About 2 feet too short to get to the bolt from the inside.
I looked at the isolator bolts which I think are like the wellnuts. I've just read that they don't hold up well and can pop out. With the Terrova, you have to remove the plastic sideplates to check on the bolt tightness and to make adjustments so I just don't trust them and would only use them as a last resort. The Trolling motor is 101# thrust so I am a little concerned about something that holds up to that torque.
I've been thinking about it and I think what is happening is with the Togglers, the screw is spinning the catch and breaking the plastic retainers that are to hold it in place until you get pressure from the bolt. I've thought about putting some adhesive on clip, pulling it tight with the plastic and letting that set up for awhile and maybe that will give me enough bite to get the bolt down snug enough to tighten.
I have used these on another boat with a terrova and even used them on this boat on my last trolling motor and didn't run into this problem. I'm just not really sure why this one is giving me so much of a problem. It isn't even the same hole. Just seems to be the 4th hole whichever one I make the fourth.
It's been 2 days of trying to install this so far with not much progress.