Given you have MK avionics, the best OSD is likely to be this one: http://www.smart-electronics.eu/index.php/en/smart-osd It's specifically designed to connect into the data bus between the various MK boards. For FPV, check out the forum at fpvlab.com . A good camera to use is: http://www.readymaderc.com/store/index.php?main_page=product_info&cPath=11_62_12&products_id=1405 As for transmitters, you have a choice of whether you'd like to operate the FPV on 1.3 Ghz, and the video feed from the gimbal camera on 5.8 Ghz. 1.3 Ghz transmitters tend to give you more range but, if you choose to use the superior quality skew planar antennae, they are much larger. Here's a sample of some 1.3 Ghz Transmitters and Receivers: http://www.rangevideo.com/22-13-ghz For 5.8 Ghz, check out the cheap'n'cheerful: http://www.amazon.com/gp/product/B0..._m=ATVPDKIKX0DER&pf_rd_r=03FBCD1FXP07YE9MVNRA As you'll see, there's a lot of choices to be made! Andy.