Okay, I see what you mean now. Couple of comments:
It looks like the Lenco arms are comparatively long and vertical (they attach to the transom higher up), so that's the source of the clearance problem. With the Bennetts, the top of the actuator arm enters the boat below the splashwell molding (and it does enter the boat because there is a hydraulic line), so at first I didn't get what you meant. Because of that, I didn't have any problems mounting the MJ as low as I wanted to - I only had to make sure to clear side-to-side with the actuator.
I mounted the MJ where I had seen others mount it, which was pretty much just snugged up against the underside of the black transom cap molding. This gives about a 3" rise over a direct transom (kicker) engine mounting (what I had before I added trim tabs). With this mounting, and a slight gap between the top of the MJ and the underside of the engine U section, all fit just fine (but I see why you may have to go higher or further aft or a combination of both.
So... it's not the plane you have to clear, but the actuator arm. Hmm, so a pad on the aft face of the Mini Jacker would not help (my first thought).
On the fasteners: I mounted the upper ones so they come in above the splashwell. The lower ones come below the fuel tanks. I have my fuel tanks out, so I was able to through bolt those no problem. However, I could also see using lag screws for those lower fasteners, since it seems the thrust on the lower part of the MJ should be inward... right?
My kicker was mounted (when directly transom mounted) closer to the main than to the side of the splashwell "wall" (the surface the motor cables come out of from the boat). I think the theory is that the main will be turned (or can be turned) when you are using the kicker but the splashwell wall cannot. Still, I moved the engine slightly towards the splashwell wall so as to work out best with the trim tabs. It's still closer to the main than the "wall" though.
I cut off the bottom half of that "quartered" plywood filler that comes with the MJ. Both my motor clamps and the motor attachment bolts fall well into the top section, so the lower section just seemed like dead weight. Since it was about 65% end grain, I then epoxy coated it and painted it (used grey bilgekote which I mixed to match the aluminum more-or-less).
Sunbeam