Carbon frame questions

hi all,

atm I am oogling a kg 196 but some of the sellers' photo details make me sceptical.
I would be greatful if a carbon owner from here could help me clarify the details.

are the teeth on the BB quite worn out or is this a special key I dont't know?
does using a washer with teeth damage the carbon? the original look diagram does just show a normal flat washer
the seatpost looks a little crushed?
and was there something repaired at the drop out? I don't believe it was sold like this.

thanks and happy home office from Austria

There's a LOOK thread that might be better suited.

are the teeth on the BB quite worn out or is this a special key I dont't know?

?
Second pic is the rear brake hole (I think). Are you afraid that the serrated washer damaged the frame?

yes, because scratching carbon is no good for carbon? and this is the picture from the manual:

my main question is the BB and seatpost.

my main question is the BB

I'm sorry but that question is not very clear. If the seatpost is damaged you could always buy another one, but buying old carbon is always risky to some extent.

As for the brake the diagram does not show a specific brake model. Serrated washers are pretty standard, it will show on the paint but provided the bolt is not over-torqued you'll be fine.

I think the middle photo shows a metal insert embedded in the carbon, with teeth to stop it rotating within the resin when the brake is applied / when the mechanic gorillas it.

(Here's something similar on a carbon crank)

@Lolo
my question concerning the BB is the teeth of the BB key look very used. don't know the rights words in english. My main concern is that the BB is stuck or that my tool will slip over the BB's teeth.

the best thing to do is bolt the tool on, i use quite a low profile one i can stack a washer on top, then i use an old fashioned crank arm bolt to hold it in place, this way it maintains good engagement without falling off or slipping on an angle.

Splines is the word you're after ;-)

@neilbah's method is very good.