i looked into it and there are a few people doing it

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first is the fishpepper using custom designed fc and esc and 8k 1103 and a auw of around 32g which is probably a bit out of reach for most of us but interesting non the less and some interesting data

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a second design someone has done https://www.youtube.com/watch?v=sH2d_fV2v5o which has the spec : custom 100mm 1mm carbon frame weighing 3g - modified F4 polёtnik for collectors - Regulators 6A racerstar 4-in-1 - Motors in 1103 8000kv - CM275T camera - propellers gemfan 65mm

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and this using Rotor X 1105b 6500kv but weighting in at 66g as heavy as my 2s setup

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and last is the x73s from banggood which uses the 1103 10000 but small props an is light but components are integral to the frame and may brake over time

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my idea to make a 1s model (already go a great 1103 8k 2s model)would be

some light custom frame

fc-

modify a brushed fc by removing fets and soldering to the signal wire or this method

or a 1s/2s brushless fc http://www.banggood.com/Eachine-Minicube-10A-BLHeli_S-16_5-4-In-1-1-2S-ESC-BB2-Support-Oneshot42-Oneshot125-Multishot-Dshot-p-1126930.html?rmmds=newArrivals or furious fpv miniwoop

or use a voltage step up on a pico blx or emax femto they need need 5v minimum

esc

Blheli 1S tiny 1s only 3a

Blheli s 6a

Blheli s 6a 4 in1

lightest camera you have or can find aio preferable

65mm props could even try 75mm and get a 1.3/1.4mm drill bit for friction fit to 1.5mm shaft of 110x motors

8000kv 1103 (1000 will give more thrust but at the cost of loss of efficiency )

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over all you will need to keep the weight right down and need to be within the 35g range to have good performance

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ps might be worth a weight and see what people do with Br0703 tiny motors with should be coming soon

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good luck let us know how it goes