My third 3" build, i had it all over 2017!

the frame is a minimalist 128, i had several version (v2, combine all...) with differents setups

it's a pure x of 128mm

top plate: viper x or sting 180

viper x top plate
+
strong (2mm)
camera tilt

1st version: 156g
piko blx, emax RS1306 4000kv, HS1177 2.1, gemfan 3035x3
tattu 450 4s: good punch, can run on 5" track
tattu 450 3s: more precision and enough power for garden race or indoor competition
4s first, and 3s then (enought for indoor competition

2th version:
idem but with a very light but cheap nano cmos camera
+
weight: 140g

tunnel effect

3th version:
fc and esc 4-1 with a F3 10a, runcam micro swift 2.1
+
weight: 134g
good reactivity with the GF3052x3 (not tested a lot on this build)

sensation of lack of power on 3s, whereas the weight has never been so low on this build!
that was time to try the last RCX RS1407 4100kv on this build ! -----

video:

4th version
RCX RS1407 4100kv, gemfan 3052x3
+
weight 130g (strap, led, props, protection...)
good reactivity

motor consumption (less than 1m30 of autonomie with the 450 3s)

about the sting 180 top plate
+
2.1g (3.9g for the viper x)
reactivity, more power than the RS1306 on 3s

camera tilt limited
no more power on 4s (si it can be an adavantage...)

video:

+
correct weight

-
mono plate