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Luka both of my cooled cameras use the 90 degree bent cold finger as per Rolands design. They bend toward the back left side and are supported by carbon fibre brackets that i made to take any load off the finger ( the brackets screw to the camera using the tripod hole). In my second camera i opted to take it straight out from the sensor as i was eliminating the little comms board. But the finger still bend 90 degrees to the back outside of the camera to mount the TEC, only the little step bends were eliminated. The advantage is you don't have to do the fiddly little step bends to create clearance to put that small comms board back in. However, i did make a carbon fibre spacer that goes in the spot vacated by the comms board, so it supports the cold finger as it comes out from the back of the sensor board.
I also sprayed the cold finger with four coats of PlastiDip rubber paint to help insulate it and cut down on frost build up.
BTW i picked up another working 450D on ebay today for $86. It had a scratched rear screen and no one bid on it. There are some real bargains around if you keep watching for them. It is worth more than that as parts.
Good luck with your mods and ask anything you need to clarify or help you along the way.
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