Not bad.. Not bad at all!! theres a little bit of trailing in them, but the 253 mist have made you happy!!! Thats been eluding you for a while, but now... Now you've hit the nail right square on the head!
Why are you shooting at ISO400 by the way? If you're shooting darks (and im pretty sure you do) you should shoot ISO800.. the amount of detail you'd get in a 15min ISO800 shot would be intense.!
Just a suggestion also, the top and right hand edges of the 253 shot show the rotation and movement between subs, the image would look a lot better with those darker areas cropped out....
A Job well done mate... Now go get some sleep
