Just installed the IMS tank on my 2016 Xtrainer. Not sure its worth the extra fuel, but if you run out, its worth it!
I had a little fit issue with the front bracket, it was mis-punched and did not fit. One quick email to IMS and Daniel sent me a new bracket, no charge.
So their customer service is excellent. It still took a little bending and fitting to get a nice no stress fit of the front bracket. I did add one fender washer under the front bracket to help align things up.
I had to trim the body pieces in a few spots to help the fit. The best part is the larger tank does not use any cross feed hosed or fitting.
Makes removal very simple.
Have not ridden the bike offroad yet, but I can't tell much difference from the way the stock tanks feels.