If you are using all exotek parts I don't see why you would have an issue.

I have the exotek chassis and inline mounts, what I found is that if you are using large lipos like Hyperion 6000s or Gens Ace 6000s, you will want to go with a longer screw to hold them in. You don't necessarily want to use that extra battery post spacer as when you put that on, it makes it hard to get the lipos in and out as they are just too tall, not enough room to lift them out.

I went with the spacer on the front most posts, then nothing on the rear. I can barely flex the rear post now and the batteries come out fine. I probably can take the front spacer out too.

I also used what I think comes with the SC10 4x4 kit, this self sticking battery foam spacer. I cut it so that it would go between the opening on the battery tray and that raised portion on the center of the chassis. this takes up any slack between the batteries and the tray as there is some, at least, from what I am seeing with my batteries.

I would also recommend you loctite the heck out of the lower mounting screws for the battery posts so you don't have them spin when you remove the top screws holding down the strap. What would have been really cool is if exotek had made the battery posts with a small notch on them and a matching one on the tray they stand on. That way the lock together so the post doesn't spin.