I do a lot of solo river riding. So I really do not want to even risk the chance of being stranded. Its bad enough that I dont have a reserve line anymore. I have been entertaining the idea of keeping 2 liters of premix inside the engine compartment in case, but would need to find a nice durable container first.
Secondly, I would love to use advent, but I cannot find one cheaply.
Both TL's I've had got at the very least 2 full tanks out of a battery, and that is with two 500GPH's running full time, and lots of restarts.
And with a good battery (Jetworks, NOT!!! Odyssey) you get three to four tanks.
Can't comment on the Buckshots, as I've never used them. That said, I have never heard/read anything good about them for rec riding/freestyle use.