I would like to close this thread down now and let it go to the archives. I have retired the mono cooled 450d and since it has failed to sell here in the classifieds it will probably be broken down for parts and sold off on ebay. I have not given up on mono imaging but am shifting to my new ASI1600MM -Cool camera which i am testing with now.
I have enjoyed the development of the mono cold finger 450D and i believe i have demonstrated what it is capable of achieving in narrowband imaging. Your welcome to check out my Astrobin gallery top row for the narrowband images from the 450D.
Luka i think you need to start your own build thread now, and i will be there for advice if you need any help.
Thanks to everyone that stopped by this thread with encouragement, advice, and good wishes.