Would it be safer to just keep a jack with the trailer to always make sure of the correct angle on the ramp?
Since the plate is now lower than the plug was, what will happen when the skid plate catches on the edge of the trailer. can it tear the mounting bolts out of the engine? Since the plate is lower are you even more likely to hit getting onto the trailer?
OR
Since this is for a trike, Add a board to the deck of the trailer to hold the front tire higher up until the engine is past the trailer edge.
If I had the height of the trailer bed, length of the ramp, ground clearance of the trike, wheel base of the trike, and distance from front wheel of trike to the low spot, I could calculate the best size and shape of board to give adequate clearance for loading/unloading.
Just puking up ideas here.