FSA K-Force light MTB carbon crankset, 42/29 with bb

I got this crankset on veloswap(crankset and bearings) but I realized that arms are too short...they are 170mm, but I will need either 172.5 or best 175mm. Crankset shows some wear and scratches but nothing crazy, no cracks. It's missing little extracting cup and I'm not sure if it can be used without it. Bearings according to seller are ceramic, but I'm not sure as i didn't check them inside. I'm not sure if bottom bracket is compatible as I got it from different road bike and I just swaped bearings so im not sure if there is a difference(I'm a guy from square, ISIS cranksets era), their width is 68mm inside, weight is 708grams. Crankset overall is great and new chainrings costs about asking price. Price includes shipping to US, to Canada it's $15 extra.