Semi-pivotless frame

[Drew]

Ok so you're opting for that style of frame more for handling (and space).
I sorta see what you're saying about space, but why does that increase the space so much more than the older style frame? You'd need to build the support structure to hang off the frame anyway.

There's nothing in the way on a beam. You can make a cradle to support your whole motor and cells, that bolts to the original engine mounting points. It can then go in and out with ease. In afixed cradle, everything has to go in sideways.

There are upside to the cradle too. But the final package is where the beam comes into it's own.

[Delphinus]

You can make a cradle to support your whole motor and cells, that bolts to the original engine mounting points.

Yep I see your way of thinking.
Due to that and the poor handling you rekon on the GPX its off the list.