I am looking to get into a new jet and have been doing some reading and it seems to point to a Flash as the best option for what I want. I have been looking at either a used C Flash or U Flash new or used but I have been pondering power choices.

At this point it will be either a 100 or 140 and I was leaning to a 100 to keep it light and would like to try and get the fuel usage down for longer flight times and keep residual thrust down for landings.

Is there options for additional fuel over that of the wing tank?

I have also heard that the 100 is marginal for that bird as I don't want an under powered jet either. Operation will be off of grass fields.

Any thoughts?