I'd like to pull the trigger on this but I can't see the benifits of the the blocks. I think I have more ajustability just by shimming the kit blocks as necessary. As far as the hinge pin friction, imo if you shim the pins properly that doesn't mean a thing.
However I think the chassis looks good.
I'd like to see Exotek come up with their version of the cantilevered servo mount.