Bert, as you posted your data, I opted to download and give it a go.
Image is below (50pct size 1.6mb)
http://www.martinpughastrophotograph...Z-LMC_Pugh.jpg
Having access to the FITS told me a lot. Indeed, I think both your focus and your guiding were not optimum during this capture. Your image scale is 1.79asp, while FWHM of on-axis stars was 4.5" - that's over double. Plus, most stars I measured were 20% out of round, indicating sub-optimum guiding.
HTH
Martin