Thanks! I took around six or 7 shots at the same time, they were all of equal quality, so I just picked one from the set. I've done a few of M42, but when you don't have accurate polar align, and you're not guiding, it really limits what you can do. Even 15 sec subs are showing significant star trailing.
Things are looking dicey with my job at the moment (probably gonna quit the job, sick of being used and abused), so there goes getting a car this year, and getting a guiding scope/autoguider unit too...so I'm going to have to wait I guess before doing much more DSO imaging it seems.