I discovered a cool little trick for the 21 century arbor press tonight. I was making a oak platform because the hydro has to be attached to a base in order not to tip when using. Then I got some 5/16 fender washers from Home Depot. Realized I can adjust them with the holes in the press base, so my Wilson seating die base can slide right in to the perfect spot every time! No more looking down to check to make sure it’s centered.