Really like this micro frame that ticks all the boxes for me : low stack even with Runcam Split mini, top mount battery and most importantly unobstructed HD footage (no props in view), it can take 2inch, 2.5inch and 3inch props.
The frame accomodates two 20x20mm mini stacks (front one for the Runcam Split mini and rear one for the FC & 4-1 ESC).

1920x1080 video screen grab

I used mini/micro version of my favourite quad build components :

• CL Racing F4 mini FC
• T-Motor F15 1106 6000kv motors
• Spedix GS 25A 4-1 mini 32bit ESC
• TBS Crossfire Nano Rx
• TBS Unify 5v VTx
• Runcam Split mini

The frame is really small, body is about the same size as swiss army knife, and quite tiny when placed next to my Stingy quad.

I intend to run following props and respective batteries :
Gemfan 2040-3 (CNHL 3S 350mAh)
Gemfan 2540-3 (Dinogy 3S 600mAh)
RotorX 3044-3 (Dinogy 3S 800mAh or Acehe 3S 850mAh)

The total weight incl. the 350mAh battery is about 150g, or 120g before the battery.

All in all a very versatile micro quad with different prop choices, from tiny whooping to fast moving bullet and with full HD 60fps recording capability.

notes :

• mounting holes for the two stacks are for M2 screws, this is correct size for the Runcam Split mini, however for the FC & 4-1 ESC that I used M3 mounting holes are required (simply drill out the mounting holes bigger with 3mm drill bit)
• the CL Racing F4 mini can provide only 800mA through the 5v reg which is "borderline" current for all the 5v components (Unify Pro 5v Vtx, Crossfire Rx and the FC itself), I've therefore used dedicated 5v BEC to power the Vtx separately (it fits nicely between the 4-1 ESC and the FC) and I'm running the Runcam Split mini through the separate 9v pad on the FC
• CL Racing F4 mini comes with 4 UARTS, 3 of which are non-inverted (UART4 --> Crossfire Rx, UART3 --> Smart Audio, UART6 --> Runcam Split Mini control)
• the CNHL 3S 350mAh 30C batteries are not that great, I'm unable to pull more than 200mAh out of these, I'll be replacing them with either Tattu 3S 450mAh or Infinity 3S 400mAh batteries (for use with 2inch props)