Bottom Line: Success!
Vertical orientation left a lot less support pockmarks, and slowing the print WAY down made for greater detail.
Also, breaking off the supports before curing helped me get into all the nooks and crannies. Thanks to Rodrick Campbell for the kind suggestion.
My thanks to Bill Braune and Spaceman Spiff for their advice on printing at home, in particular the safety aspects of dealing with resin and solvents.
Here's the pics...
More post-processing cleanup in a bit. For now, I'm really impressed. It took a while, but it was worth it. Glorious looking 28mm scale Viper Suit weapons! Whoohoo!