Keep it up, I have a similar mount and have converted mine to motorised ready for a grab and go. My motor is a 1 RPM but have a server controller with a 10 turn pot control for fine tuning.
The link below is a couple of photos I took from my 450D on this mount, They are presentable not perfect and for a starter project I was expecting much.
The link were captured 60 seconds and there is a small drift but not objectionable. I recently tried a 120 second shot and the tracking was great but the alignment sucked big time, thats what happens when setting up in the dark.
Careful 15MB downloads -
http://www.waelect.com.au/mswhin63/M...n/index.html#1
If you are looking for professional photos then we would need to consider a EQ5 or 6 mount or better. I use DSS as well much better for alignment. Colour balance is harder though.