Dan: You are a little bit mistaken when you say the range of a 150/150 even with the long range tanks is short. I can fly my 150/150 for 5 and 1/2 hours (longer than the rear end or the bladder can normally stand) and at 120 mph that covers about 660 miles with no head or tail winds. I wouldn't call that a short range.
Just thought you would like to know
Dale