FPVCycle
Low weight, excellent balance, easy to use, easy to service, respectable component protection, and DJI Vista ready. These were the goals of the Tooth Fairy 2. The low weight of this design will satisfy those 250g builds but it's really designed to handle ~325g AUW 5" to 5.21" build. Of course, you can always run past that weight as we do so it's really up to you. We regularly carry GoPro's on our builds.
Damping grease between frame joints and under motors has been shown to make a significant improvement in quad resonance management. The difference can be as significant as going from completely un-flyable mess to beautifully flyable. More commonly it's just a minor improvement and only if you're at least somewhat versed in tuning filters. To those that don't burden themselves with tuning, there may not be any benefit other than consistency of performance across several builds. Other damping options such as electrical tape, TPU or some other solid material are only sometimes helpful and only on some quad builds (YMMV). Damping grease will improve ALL quads resonance profile without exception. The difference is that grease is a liquid and tape or some other material is a solid. Solids have elasticity while liquids do not. In fact if electrical tape helps, it's the sticky liquid glue attached to the solid electrical tape that is doing the work. The solid component of the tape is making it worse because it has elasticity. Regardless, if you're looking for performance improvements, vibration management and reducing filters are the easiest way to go. At this point it is recommended to use some sort of damping grease on every build because of how significant the benefits can be. That being said, we will also be the first to point out that vibration management is not at all required the vast majority of the time because of the software management in all flight code today.