Re: Trailering Bracket
You don't want to trailer using the trim/tilt since tilt cylinders can be moved given enough force applied. They do have internal valving and may not hold during a rough ride. You may end up dragging the skeg.
With the trailering bracket, you insert the bracket and tilt the engine down 'till just past contact. That way, the tilt cylinder will keep the leg firmly in contact with the bracket.
I have used the trailering bracket for a number of years with no problems. My take on it is that if the transom is strong enough to take the thrust loads of the engine while running, (especially the thrust on a hole shot when forces are highest) it is strong enough to take the smaller loads applied by bumping down the road. If the stress on the transom is too much and causes damage, then the transom needed repair anyway and you were in danger of losing your engine in the water.
The bracket is wicked expensive new, but if you are handy, you can make one relatively easily.
Here is a photo of one of my bigger engines using the bracket. This particular one is made from square tubing and 1/2 inch rod, chrome plated. I have others like the one shown in the diagram. ALL are strong enough to take trailering loads safely.