A230 Linkage Up or Down?

It is common for HH shifter bolts to work loose over time, unless the holes are drilled to exact fit the shanks.
In your pic from post *1, that long adapter plate; does it have a front support or are the two rear bolts all that is holding it on? At the front, I see what appears to be a second plate. Is that a stabilizer for the long plate?
Or is the long plate a 1-piece plate bolted on at both ends?
IMO without a front anchor, that long plate would eventually work loose.
The bolts that hold the shifter to the plate are a common source of aggravation. I use a grade 12bolt hardware with hardened flatwashers and no lock washers, just a bit of loc-tite. The holes should be a very-tight fit to the shanks; if they are not, they will work loose.