Nice looking rig. Looks a lot more professional than mine. My Sony a57 with the 50mm Macro will cover the entire slide with even more enlargement available. Your results look very good. A camera having a higher pixel count can only make them even better.
Sony A57 with 18-55 kit lens, Sony A200 and Sony H70
50mm f3.5 Minolta Maxxum macro
24mm f2.8 Minolta Maxxum
100-300mm Minolta Maxxum APO Zoom
70-300 Sony apo G SSM Zoom