Hi,
I've printed a lot of Davis's models as well as those of ECI (although I find David's to be much better detailed). Printing directly on the plate is possible, but it can be difficult to remove and when I tried it I often ruined models. Nowadays, I always use supports and angle the model at least 30°, like Kelly said.
I do have some problems with thin signal masts, but I don't like those in resin anyway, so if they are present, I cut them off, drill a hole and use brass wire.
ACW ship are great fun, I love the variety and the improvised and sometimes crazy designs!
Best,
Thomas