Honest question … how does one get to the fuel tank on a cantilevered wing, without a stepladder? I’m often fueling from cans in deepish snow, on my 170 I can use the strut to balance while I climb up there. The supercub on floats has a step on the gear, but still use the strut to balance. Ladder is inconvenient to have to carry, sketchy at best in the snow, not doable on a beached floatplane…
I’m sure there’s a way, the helio is a real off airport machine. I hope the 15 ends up with a practical way to fuel away from pavement.
I also think a strut based design is probably lighter. The access to my 170 is great, the door opens very wide, and it’s quite easy to get in. Strut behind the door would be hard on a taildragger with big tires wouldn’t it?