Roma, Sorrento, Florenzia, Como, Bolzano, then Venezia. Side trips to Lucca and Pisa. In Como we will be near Monza. Maybe another side trip?
The bolts might be stretching, in which case some stronger ones can help. Or, the aluminum case might be compressing and less clamping force might be optimal. Or, the bolts might be rotating out. The solutions to these problems are completely different so more data collection is needed.
Doweling might help. Who does this?