Designed/printed the drive shaft extension, here it is
openscad code
module drive_shaft () {
difference() {
union() {
cylinder(h = 24, r = 3.7, $fn=60);
translate ( [0,0,15] ) cylinder(h = 19, r = 2, $fn=60);
}
translate ( [-2,-0.7,24] ) cube ([1,1.4,11]);
translate ( [1,-0.7,24] ) cube ([1,1.4,11]);
translate ( [0,0,-.5] )cylinder(h = 15, r = 2.4, $fn=60);
}
translate ( [-2.5,-0.5,0] ) cube ([1,1,11]);
translate ( [1.5,-0.5,0] ) cube ([1,1,11]);
}
drive_shaft ();
That's for those who want to print their own. Note it must be printed horizontally not vertically, if printed vertically it will shear across the deposition plane.
Here's the part fitted
I have a 2.4ghz rx/tx, I'm just waiting for an esc, haven't decided on a battery yet. I think I might be able to mount the battery between the chassis rails at the back if I redesign the cross braces/rear wheel mounts, but that's an exercise for later.
Alwyn
