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Yes Luka i used 2mm nylon spacers, and you may need to cut the screw heads slightly to avoid them getting caught on the board edge. The good thing about nylon screws is you can melt them on the edge if you need to. You need to watch the clearance under the nut on the bottom under the finger, you don't want to have the finger high sided on the nut againt the frame. On my colour camera i drilled a counter sink hole in the frame But you need to remove the frame from the camera to do that, not easy. On the mono camera i just melted the end of the screw shaft with a soldering iron to turn it into a nylon rivet, and that had no clearance issues. If your not bending the cold finger like Rcheshire's pattern, but carrying it straight out the side, tere will be no bottom clearance issues. Re screw size i think i used 3mm at least on the one i turned into a rivet. Bought the nylon hardware from a RC (radio controlled model), online shop located in qld.
If you run the cold finger straight out you will need rest it on a spacer attached to the frame, i used a carbon fibre spacer on my mono camera, made of 2 small pieces of 2mm carbon sheet epoxied together. You just need to experiment with what size you gap is.i put double sided auto trim tape on the spacer to bond the finger to the camera frame. All of this is 'bespoke engineering' so just do what is right for your version. I hope you remembered to insert thin plastic strips down the sides of the cold finger where it passes behind the sensor, this is important to keep the finger from moving side to side and even more important, it keeps the finger from shorting againt the sensor pins, which could kill your sensor.
Good luck.
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