After much trying, it doesn't seem to work
I have followed all the instructions namely
1. Downloaded the firmware and installed by replacing files, and the instructions on installation.
2. Removed the spring on both my XT-2 and T10
3. Pressed the shutter to 'learn' HSS
Despite all this, there is no HSS - on one of my two VT 11s after pressing the wheel, it says 'Fuji does not do HSS' - even though it instructed me to take a shot at 1/1000. On the other VT11 it learns it, and 'HSS on' appears, but it does not synch at speeds above 1/250 on the XT2. The flash guns are the Nissin i40 and the Fuji EF-42.
So, the VT11s will synch normally at 1/250 and under, but still don't provide HSS at all over 1/250. I await any further firmware upgrades, but might have to take these back to have a refund unless anyone can tell me how to make them work?