If you do another batch of RF's... please check out your necks. I don't know if you've had any feedback from other users, but my S5RF's neck was very thin at certain junctures and actually shook apart during play from the weight of the feeder alone (no blows, drops, etc.).
I took a page from Derrick O. and had the feedneck welded back together at a slight list, which distributed the weight over the marker like a vertical feed.
Good luck to you guys. If you do come out with a S6RF body... could I possibly send my S5RF back in to the Fat Farm for a weight reduction operation?