Thank you for your answer. How is your diff faring so far? Did you experience my problem with it coming loose? Did you build it using the kit supplied spring washer?

I can not see your pictures for some reason, maybe they didn't attach properly.

Anyway, back to my mods. I forgot to mentiona bove the steering which seems somewhat flimsy. Trying to see if the saver works, I noticed the idler arm posts flex probably because they are only attached to the bottom chassis plate and that is only 2.5mm CF. I knew I had to do something about it so i made a brace that attaches at the top to the posts and the bulkhead rear top screws just under the gearbox cover plate. That is a tight squeeze, so I had to sand down the screw heads there so they wouldn't foul the cover plate. Not by much, probably just .5mm is enough. The steering idler posts had to be extended, you will see in the pictures, I used another machind brass hex spacer on the left and came with a screw from the top, through the brace, whereas on the right I had to use a 2mm aluminium spacer and a long screw (again coming from the top) because the servo saver post only has thread at the bottom.

Here's some pictures to show the rear suspension arm sliders and the rear top deck support posts. To replace the 40mm long screw I had to use a 25mm long allen head through an unthreaded spacer and above the balljoint a hex spacer machined to 8.2mm to replace the original aluminium. This is because a round threaded spacer is difficult to take off the screw with nothing to grip on. The hex is much easier to manage. The screw coming from the bottom (the allen head 25mm long) doesn't go all the way, so at the top I had to extend it with a 16mm set screw and lock the top deck in place with a locknut. There is enough thread projecting above the locknut to screw on the body post.

Next two pictures show the 64 pitch gears and the spacer used to move the spur out a few mm. The motor comes very close to the belt pulley, but there is about 1mm of clearance left which I think is enough.

The last two pictures show the rear battery locating plate with the stopper and the way the plate is retained floating above the collars on the two rear lateral top deck posts.