Nice Mark,
That is the glass I was going to suggest but never got around to doing so.
Here are a few suggestions in addition to the use of a tripod:
-Keep the lense perpendicular to the acrylic. With such thick acrylic, taking photos at an angle will add distortion.
-Shoot with manual settings. Increasing shutter speed and decreasing F-stop with limit blur but also limit depth of field and add minimum grain.
-Not all are keepers. Remember not every photo is going to be a masterpiece. For every 100 shots I take I might have 15 keepers and 5 that are awesome.