The RD210, my second build, a very strong frame with 4mm spare arms, a classic H design as the LUMENIER QAV-210, for a similar behaviour / weight, but stronger than the QAV. I had spare parts for this frame and never used them, the arms are very strong. The antenna on the pics is a french model, a high end model; "la fabrique circulaire panta racer", made with high quality. But most of the time, i used a tbs trimph, a strong model, and the last foxeer antenna, wich is cheaper so, an interesting alternative. Motors are cheaps, but quite enough to begin in fvp racing, and the flight controler, a cheap SPF3 make a better job than a classic naze32, especially with the with the littlebee 20a opto pro esc. The core turns on BF at 4k 4k, so not bad. This build is a good solution to begin quick and fast. Here a review video with this frame in training racing condition: