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There has been a lot of discussion about the new William Optics GTF81 scopes. Specifically that due to a lens misplacement during manufacture most are plate solving at a higher focal length. Typically it's not much (about f/6.7 vs. the advised f/5.9) however it is worth noting.
I have the William Optics ZenithStar 71 (2013 model) and am happy with it. Following the advice about the bad alignments I checked my own and was happy to see no such discrepancy exists there.
The easiest way to check is to post an unedited image straight from the camera/scope to Astrometry.net
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