I'm going in for my revision on Thursday too, so I will definitely be thinking of you and sending you prayers and good thoughts with your trial implant- it's great that it's finally here!!
Personally, I had quite a bit of pain during the trial. I think this is partly because there's wires coming out of your back. But then it definitely wasn't as bad as the actual implant surgery

From the stories I've read from others on here it does seem like it's different for everyone- so here's hoping it won't be too bad for you, Joan, and that you'll have wonderful results!!