Originally Posted by
Fasttrak
Having just completed that section last night I think I can answer this one. The strap is mounted at the rear to the waterfall and is a fixed mount, no up or down adjustment available. The front goes into two fixed plastic pins that have no adjustment. To use a shorter lipo you are going to need to implement some foam on top of the battery to keep it in place. TLR could release a new waterfall and forward pins but I doubt they would bother.
I think he is referring to the sliders that hold the position of the pack...how far down toward the chassis do they extend? Will it hold a thin shorty front to back? I'd answer but my kit doesn't get here til tonight.