Hi Brunning...a little bit of wiggle room on these bridges is normal, but with the down-force of the strings tuned to pitch, it shouldn't be wobble around too much. If it's excessive, you could always wrap a bit of tape around the post before putting it in the ferrule.
Also, I just realized I hadn't emailed you the blueprint for the saddles yet. My apologies. I'll try and remember to do so this weekend.