2019 Cannondale System Six Carbon DuraAce or ETAP

This is a 2019 Cannondale System Six 51cm road bike. Crazy fast bike over 40km/h.

Why am I selling this awesome bike?
Got the bike early August but realized that it is just a little bit too small for me (i,m 5'10''). I need to go with a 54cm. I though it would be alright being used to a 52cm supersix evo... Too much leg for a 51 cm it seems. As you can see from the picture, I got hit by one small freakin rock that did 3 small paint chips. Nothing bad, just cosmetic...

Possibility of brand new ETAP groupset (shifters, derailleurs & brakes for 1300$ extra)

Uncut steertube.

Here are the stock parts that were not used:
New crank & gears
New wheels & tires
bar tape (prologo black)
Ultegra cassette (has only 2 rides)
new stem
Just put a new dura-ace chain on it.

Specs are as follow:

FRAME
ALL-NEW SystemSix, BallisTec Carbon, Di2 ready, SAVE, BB30a, flat mount, Speed Release thru-axle

FORK
ALL-NEW SystemSix, Ballistec Carbon, SAVE, Speed Release thru-axle

RIMS
HollowGram KN0T64 Rim, Carbon, 20h front, 24h rear, 64mm deep, 21mm ID, tubeless ready

HUBS
HollowGram KN0T, sealed bearing 12x100 front, 12x142 rear centerlock w/ DT Swiss internals

SPOKES
DT Swiss Aerolite, straight pull

TIRES
Vittoria Rubino Pro Speed, 700 x 26mm (23c)

PEDALS
Not Included

CRANK
Cannondale HollowGram Si, BB30a w/ OPI SpideRing, 52/36

BOTTOM BRACKET
Cannondale Alloy PressFit30

CHAIN
Shimano Dura ace, 11-speed

REAR COGS
Shimano Ultegra, 11-30, 11-speed

FRONT DERAILLEUR
Shimano Dura-Ace, braze-on

REAR DERAILLEUR
Shimano Dura-Ace

SHIFTERS
Shimano Dura-Ace hydro disc, 2x11

HANDLEBAR
Vision Metron 4D Flat, UD Carbon

GRIPS
Prologo One Touch

STEM
Vision Trimax OS, 2014 Alloy, 3D Forged

HEADSET
Tapered, 1-1/8" upper, 1-1/4" lower bearing

BRAKES
Shimano Dura-Ace hydro disc, 160/140mm RT800 rotors

BRAKE LEVERS
Shimano Dura-Ace hydro disc

SADDLE
Prologo Dimension, Tirox rails

SEATPOST
Cannondale KNØT Carbon, 330mm