I do like the two seat version and thought they had widened the body somehow, but they hadn't, so snug they must be.
I've fitted a 70cc into one of my Cursors, makes it a bit more usable, also retro fitted a reverse mechanism on to it, as they are fairly long cars.
My 2nd Cursor, not sure what to do with that, weather to fit a more modern 125cc engine that has reverse, will see.