Appreciate the response Stephen.. I've attached the 2 interesting log sections. I'll post these over on the PHD2 forum too.
Here is the GA result for reference:
23:10:23.405 00.000 12392 BLT: South pulses ended at Dec location -754.83
23:10:23.405 00.000 12392 BLT: Drift correction of -0.12 px applied to total north moves of 58.74 px, -0.005 px/frame
23:10:23.405 00.000 12392 BLT: Empirical north rate = 1.22 px/s
23:10:23.405 00.000 12392 BLT: Trial backlash amount is 17.35 px, 14179 ms, sigma = 0.1 px
23:10:23.405 00.000 12392 BLT: Clearing pulse is very large, issuing max S move of 12256
Just to stress - I'm pretty new to guiding so there's a good chance I've messed up on some basic setup step somewhere..
Looks like you uploaded snippets from your debug logs, not the guide logs. The guide logs are more useful as we can visualize what's going on using the PHD2 log viewer.
Anyway, the debug logs do contain the final GA recommendations:
23:11:21.450 00.000 12392 Guiding Assistant results follow:
23:11:21.450 00.000 12392 SNR=47.0, Samples=356, Elapsed Time=734s, RA HPF-RMS= 0.08 px ( 0.55 arc-sec ), Dec HPF-RMS= 0.05 px ( 0.36 arc-sec ), Total HPF-RMS= 0.10 px ( 0.66 arc-sec )
23:11:21.450 00.000 12392 RA Peak= 0.98 px ( 6.51 arc-sec ), RA Peak-Peak 6.59 px ( 43.61 arc-sec ), RA Drift Rate= -0.41 px/min ( -2.70 arc-sec/min ), Max RA Drift Rate= 0.12 px/sec ( 0.76 arc-sec/sec ), Drift-Limiting Exp= 2.8 s
23:11:21.450 00.000 12392 Dec Drift Rate= -0.07 px/min ( -0.47 arc-sec/min ), Dec Peak= 0.66 px ( 4.35 arc-sec ), PA Error= 2.3 arc-min
23:11:21.450 00.000 12392 Uncorrected Dec RMS=0.307px, Linear-fit Dec drift=-0.071 px/min, Drift-corrected Dec(raw) RMS=0.185px, R-sq=0.677
23:11:21.457 00.007 12392 Recommendation: Try to keep your exposure times in the range of 1.0s to 3.0s
23:11:21.464 00.007 12392 Recommendation: Try setting RA min-move to 0.32
23:11:21.474 00.010 12392 Recommendation: Try setting Dec min-move to 0.40
23:11:21.488 00.014 12392 Recommendation: Backlash is >= 14179 ms; you may need to guide in only one Dec direction (currently North)
It's definitely strange that the recommended min-moves were so large. For RA it could be partially due to the relatively large/fast Max RA drift rate (caused by some steep/fast part of your PE curve). Doesn't seem to be anything in DEC that would justify such a large min-move.
Will be interesting to hear what the PHD devs have to say.