The 3D printed rail parts on the other hand are very secure with virtually now slop or movement whatsoever. As they are, they are a little to rickety for my liking. I'm going to have to take these inexpensive bipod legs apart to see what I can do to tighten them up a bit. The bipod legs themselves are woefully lacking in tight tolerances but for the purpose of showing how they are intended to work I'm pretty sure these quickly taken photos will bear that out. Everything fit exactly as I'd hoped they would. Here are a few pics of my two very dusty air rifles wearing the 3D printed Picatinny/Weaver rail sections I recently printed out. If the file size of any of my pics are too large I have a very hard time uploading them onto the various internet pages where I post my ideas and inventions. I'll post some pics of the computer renderings of the new design for the original model Umarex Octane once I can get those pics edited for the internet. I guess they have rabbit problems like Texas has hog problems. This same guy mentioned to me in our email correspondence that the local municipalities had taken to using certain types of poison to try to stop them from reproducing. With any luck they'll work out just as he imagined they would and he'll be able to give those New Zealand rabbits a dose of lead poisoning one pellet at a time. I shipped off the first set to our friend in New Zealand this morning. They won't fit quite as aesthetically pleasing as these Octane Elite replacement screw covers but they'll serve the same purpose. I thought I'd try making up a set of these picatinny sections for my 1st-Generation Umarex Octane as well.