The tour of ShopSabre sounds like fun!
Its interesting that you saw the screw so much. Don't forget that every spec of dust you make will also see the screws.
On the Techno machines that we have, The screws are hidden inside a pretty much sealed aluminum housing and they stay very clean, therefore very lubricated for a long time!
I still think the Technos are way ahead of most others!
P.S., ask them to actually cut something for you at 600IPM, let alone 1200IPM.Those numbers sound great in catalogs, but in the real world of wood, 200IPM is pushing it!! Just a thought! Merry Christmas!