GEPRC Cinelog30V3 No Prop Guard Bottom Plate

I have been using the GEPRC Cinelog30 V3 for quite some time, both for work and for recreation. In the past I made a cut-down version of the official prop guard to reduce air drag for more action-oriented outdoor flying. It worked quite well, but the design was awful.

I finally found the time to redesign a bottom plate from scratch, with the housing for the DJI O4 Pro air unit. It is lightweight (under 11 g) and strong enough not to break on the first hard landing. It houses the antenna coax and camera cables, and it supports the front camera cage, which helps keep the cage from being dislocated in a hard landing (not in a hard crash, of course). The USB-C port of the O4 Pro air unit stays accessible; for the microSD card you may need small, thin pliers.

Boost MeBoost Me if this model is useful for you! I made two versions:

- No inserts: use as is. It works, but don't expect to assemble and disassemble it every week. The two screw pockets on the middle top posts won't hold much after a few cycles.

- With inserts: the two screw pockets are wider, to host M2 heat-set inserts (3.2 mm OD, 3 mm long). This makes it longer-lasting and more stable.

I printed it in PETG and have flown it a bit already. It does the job. I have not worked yet on PID tuning, might do in the weekend. It is not as sturdy as the original injection-molded prop guard, but it works if you are a good pilot and know how to land properly. A version printed in PETG-CF would be ideal. It is super lightweight: under 11 g without inserts, versus almost 30 g for the original prop guard mount. This lets you mount bigger batteries (LiHV 850 mAh) and still keep the drone under 250 g.

What's included

- NoInserts version: flat inner wall on the two top posts, self-tapping M2 pilot. The O4 drops straight in.

- Inserts version: pockets for M2 heat-set inserts in the two top posts (insert 3.2 mm OD x 3 mm long). The posts are round again in the top 9 mm.

- Both are sliced as ready-to-print 3MF files (Printed on my Bambu P2S, PETG).

Features

- Vented camera cage with 4.5 mm webs between the vent slots.

- Open port windows: microSD on one side, USB-C on the other.

- O4 air unit mounting holes and window offset 1.0 mm toward the front.

- 1 mm chamfer on the lower outer edge of the front and rear arm walls, ramped at the ends, to print cleaner.

- About 11 g printed (10.6 g on my scale without inserts).