I found another sweet spot for my / the S3+ at a frequency of 275 and a voltage setting of 0815. I had to change the timeout from the suggested 15 to 14 to reduce the HW errors and having run it overnight, it looked good. I've had to power cycle the rig (as I did not do that yesterday) and currently re-running the setting, but looks good thus far! (also updated the OP on the OC thread here: https://bitcointalk.org/index.php?topic=750220)