I have been using the zohd Kopilot with GPS & RTH, as have some others here & it works well, no soldering or computer programing its plug & play, but it has a drawback that just doesnt work for me, they messed up programing the altitude height while in return to home mode.
it RTH at 114ft..... where I live most trees are above that , so if I loose my video signal in RTH it will fly into a tree at some point
so I have just purchased the
......AFPV SN Sparrow FC Flight Controller Stabilizing 6-Axis Gyro With M7 GPS Module for FPV RC Airplane Fixed-Wing
https://www.banggood.com/AFPV-SN-Sp...p-1356353.html?rmmds=myorder&cur_warehouse=CN
RTH is a necessity with FPV flyiing IMO and more importantly to long range FPV pilots ...
.....the Sparrow is a clone of the zohd but with better features
the RTH altitude is above 300FT "from launch altitude"
havent tried it or received it yet, but I do know the zohd Kopilot and this IS an improved clone....setup and instructions are almost identical
manual
http://img.banggood.com/file/products/20181212035738SPARROW-EN.pdf