Ducati tank expansion

My beloved Italian Mistress has a fault:  Fuel tank expansion.  There's debate as to what the cause is in the www.Ducati.ms Sport Classic forum.  Some people don't have it but most every one else does.  I'm guessing I have it as there is 2-3mm of side-to-side wiggle at the front of the tank.
Other owners are experiencing paint bubbling, too!  And these issues are not solely the bane of the Sport Classic line, it also affects other Ducatis with plastic tanks made by Acerbis, an Italian plastics and OEM company.

In order to combat this tank expansion (and possible paint bubbling issues), which at the worse will have the tank come off it's rails and flop around, is to coat the tank with a protective coating.  This seems to be the best way to stop tank expansion.  So the friendly staff at JC/PAKBIKES perform this service.

Yesterday I removed my tank, took off the fuel cap and fuel pump, and cleaned out the tank.  It's sitting in my closet for the next two weeks to dry out and, hopefully, unexpand (shrink back to stock width).  I took a measurement from the outside edges of the mounting pucks, where they meet the tank, and came up with 33.5cm...maybe a tad bit more but definitely under 34cm.

 

Map of the tank belly.

 Example showing how I find the edge to make the measurement.