Saddlepack for Trek Domaine (carobon seatopost compatible)

[tomgdaly]

I was going to buy a Blackbourne saddlepack for my Trek Domaine but it said 'not compatible with carbon seatpost'. Is this just 'covering their ass' - it's just for overnight trips and I won't be carrying a lot of weight?
Otherwise, can anyone reccommend a 'cheap and cheerful' pack that will do?

[Lentamentalisk]

Covering their asses. But putting some frame tape on your post wouldn't be a bad idea to avoid some of the wear on your delicate bits.