acheparev@jschiefer I took out my extra mount and fitted my Contour Camera into it and then fitted the Contour Mount into the handlebar mount. Picture attached, It went in without issue.
acheparev@jschiefer I'm sorry you are missing parts. You should contact Shapeways and have them re-issue your order. Below is an image of what you should have received in your order, you can also look at the 3D rendering that Shapeways generates to make sure you have all the parts. I have had 4 mounts printed already without any missing parts, but one did have print quality issues and was reprinted. As for the contour adapter not fitting into the mount, I am not sure why that is. All 4 of my prints fit into the mounts. Because of the nature of 3D printing, the material is very rough and may need to be worked a little, but you really should not have had fit issues. I have been using my mount with my iPhone 5 and am now using it with my iPhone 6 without issues.