I designed a full cover to protect the ZMR250 in case of crash... I'm a beginner with quadcopters... and I find it expensive at times :) But, I have never printed this, and I gave up on it now. There are too many variables, like the camera type and angle, if you have spacers or not, etc. I will now design a series of modular parts to protect the quad, but much simpler to print. Please have a look at my other design, which I printed and am using (working): http://www.thingiverse.com/thing:817622 If you want to print this for yourself, go for it, but please let me know how it goes!Pretty hard to print if you have just 1 nozzle. I have not printed this yet, and I might not ever either... But if you do, let me know how it goes! The cover stops on the quad's arms, and there are 4 little tabs underneath that should clip under the bottom plate. As is stands, it is for use without special spacers, only the 3mm space created by the arms.