2018 Cannondale Slate 105 with upgrades w/extra parts

Up for sale is my basically brand new 2018 Slate 105 build. Has about 20 miles on it. I have just acquired too many bikes and need to make room in the garage. Upgraded tires, stem, frame protection and drivetrain. Comes with many extra parts. I regeared the bike to what the current 105 Topstone is because I felt that was better for gravel grinding/adventure riding but I will provide all the stock parts as well.

Retail is 1700 stock this one comes with extra stuff asking $1350

In addition to the below build spec the bike comes with: (which is all NEW)
Stock Stem: Cannondale C1, 6061 Alloy, 1.5", 31.8, -5 deg. 100mm
Stock gearing:
Cannondale Si, BB30a, FSA rings, 52/36
Shimano 105, 11-28, 11-speed
Shimano 105 short cage
Stock tires:
Cannondale Slate Folding TRS, 650x42c, by Panaracer, tubeless ready

Build:
FRAME
Slate, SmartForm C1 Premium Alloy, Di2 ready, SAVE PLUS, BB30a

FORK
Cannondale Solo Rigid, OPI One-Piece Alloy, 1.5" steerer

RIMS
Mavic XM419 Disc, 650b, 28H, tubeless compatible

HUBS
Lefty 50 Road front, Formula 142x12mm thru rear, 28h

SPOKES
DT Swiss Competition

TIRES
WTB Resolute 650x42
PEDALS
Not Included

CRANK
FSA hollowforged Energy 46/30t

BOTTOM BRACKET
FSA BB30 Bearings

CHAIN
Shimano HG601, 11-speed

REAR COGS
Shimano 105, 11-34, 11-speed

FRONT DERAILLEUR
Shimano 105, 31.8 clamp

REAR DERAILLEUR
Shimano 105 long cage

SHIFTERS
Shimano R505 Hydraulic Disc

HANDLEBAR
Cannondale C3, butted 6061 Alloy Butted 6061 Alloy, Compact

GRIPS
Cannondale Bar Tape w/Gel, 2.5mm

STEM
Thompson x4 stem black 45mm +/-0

HEADSET
Tange Seiki Head Shock Integrated

BRAKES
Shimano BR785/505, 160/140mm

BRAKE LEVERS
Shimano R505 Hydraulic Disc

SADDLE
Fabric Scoop Radius Sport, Cromo Rails

SEATPOST
Cannondale C3 Alloy 27.2 X 350mm

SIZE
Large