2007FSR Clarke Tank
 

The 2.7 gal tank fits OK with a little work. The tank sits and mounts slightly further back than the stock tank. If you try to force it forward to clear the ECU plug, the side pods of the tank hits the radiators, the front mount misses the threads, and the forks make contact with the tank at full lock.
The brass inserts are very nice.
The large hole where the fuel pump assembly mounts to the tank is slightly oversized by at least 3/32nd. It hasen't leaked yet. The company I purchased it from said let us know if it leaks, and the'll handle it.
Clarke needs to move the ECU mount on the under side of the tank as far forward as possible.
I had to oval the mount holes on the ECU to slide it forward, the plug needs clearance from the cross bar.
Maybe the second generation tanks will fit without alteration.

My ECU barely clears the frame also, otherwise it fits good.