Just an off-topic comment on 150/150 insurance. The insurance companies do not recognize the added value of the 150 (or 160 or 180) hp conversion. It is not necessarily that they are low on their value, it is just that they are not willing to insure upgrades to little airplanes that add 30-50% to the base value of the plane.
I explored this extensively with my 150/150 and that was the answer I got back. As it was, I managed to insure for about $29K after a huge amount of justification including the LR tanks and stol kit, but was still way below value.