I originally built an Airblade Cream Puff, when I saw the Eclaire V2 released I couldn't resist. I was one of the early adopters, the first batch allowed the side plates to move, this has since been fixed, for my fix I used o-rings. This year I was inspired by the Baby Hawk R release, and wanted a drone for the backyard. I wanted to solve all the issues with the Cream Puff, I wanted a good camera, osd, full range, a frame to protect equipment. Over time I picked up parts, I decided to take a gamble on the Racerstar motors as they are only rated for 2s, but I thought 7000kv should be ok on 3s. If I were to do it again for a little bit extra, would probably go for the 1105 7500kv by AirBlade which are rebranded DYS motors. For the f4 controller I was able to flash with betaflight 3.3, the OSD was easy to setup, I decided to rotate the board so that the USB port was on the side. The FC and 4 in 1 ESC communicate using the pin connector, so nice not having to solder up the signal wires.
I ran into a big issue with the FC, that is the holes were not big enough for m3 which is what the ESC is setup for. The way I got around it was to take a metal m3 bolt and slowly bore out the hole so that the nylon screws could fit. If I had an m2 bolt instead, I would have used that, I added it to the parts list. For mounting of the receiver, I actually was able to sandwich it between the two boards, and for the vtx I just used some heat shrink to protect it and stuffed in the back, its the perfect width.
After building and flying, I found the battery to be a bit big, I would go for something a bit smaller like a 450mah. It all depends, with the 600mah I was getting great flight times, it just doesn't accelerate as quickly. Overall the Eclair V2 is great, certainly, put a smile on my face when I chased my friend's budget 5 inch build and was able to keep up.