I finally got a chance to try out the modded 300D last night. Certainly the exposure time was lot shorter on the Horsehead then last time and I did get more of the redness.
Also gave Eta Carinae a go. Jupiter was imaged before the nebulas since saw the GRS through the eyepiece so had to try to capture it.
Polar Alignment was still either out or the Nexguide was not doing its job, or both, but this time the subs were not drifting down the frame so I think I was closer to the SCP then before.
Here are the results.
All frames were 150sec subs. The Horsehead had 22 that were acceptable and on the Eta Carina I used 10 of the least oval star subs.
Thank you for all the kind comments, the horsehead is definitely a lot better then with the unmodded camera but there is a lot... LOT more room for improvement... perhaps its time to attempt narrow band photography.
I tried to image a close up of the horse head since taking these pics, but the image turned out murky and soft, but looking at the sky it was obvious that there was a lot less transparency then the night of the posted pics, sky looked amber and bright. Hopefully the next time isn't too far away before the weather lines up with days off in a positive way... even with the moon out, I think Ha, OIII and SII should be OK.