Wanted a lightweight 3" topmount freestyler.
With most 3" frame being quite heavy (Micro Apex 58g??!!), I decided to go for the Micro Reverb (33g, much better) despite knowing that things will be a little tighter.
Having a pretty good idea from my other tight 3" builds, I knew pretty much the parts list to go for.
Check out https://rotorbuilds.com/build/26823 and https://rotorbuilds.com/build/26466

The result is a light build (120.5g dry) with 1404 motors on 4S!

I've added a pic of my Micro Reverb against a buddy's Micro Apex, and you can really see (and feel) the difference in size and weight.

Things to be aware of:

• Vista must be stripped to fit
• The old DJI Cam wont fit nicely unless you file away from the cam mount holes in the side cam plates (very easy) - or go for a nebula pro or new DJI cam if you have one
• And for some reason the Micro Reverb frame kit came without a strap (and only the velcro-type battery pad)
• yes, the arms are only 2.5mm thick. I hope they'll hold up at least mild to medium crashes... good thing they cost only 10$ for a set of four :)
• and yes, props are in view as opposed to the Micro Apex, but that was clear from looking at the frame.

Other than that' it's a very straight forward build, and so far it's been an absolute blast to fly!