what is your plastic tank experience after all this time?

[ducpainter]

I think it was more than the slots, but don't know for sure.

I think that the bracket was re-designed for even more rearward travel than the slots allowed in the stock bracket.

[ducatiz]

I think that the bracket was re-designed for even more rearward travel than the slots allowed in the stock bracket.

The bracket was swapped.  Last version I saw actually let the tank move on its own.

My coated tank is still going strong.  Didn't ride much over winter and left the gas in it on purpose.  very little expansion.

[hillbillypolack]

I still have my S2R 1000, though I did remove the tank as the fuel pump had failed (separate issue).  I was seeing minimal dimensional changes, the most notable was latching and clearing the ignition cylinder.  Since I was planning to upgrade several areas on the bike (forks, clutch) and had a Spark header & Termis, I'd like to keep the bike and enjoy it.  I was considering a metal tank - and still may do that.  It's one of the last true air cooled / dry clutch Monsters, so I have a sweet spot for it.

[Speeddog]

I've converted several bikes to steel tanks.

It's a rather expensive proposition, as very few of the tanks components will swap from the plastic to the steel.
You'll need to get an external fuel pressure regulator as well.