Wanted 25mm Seatpost

[zerogravitas]

I used one on my Vitus 992 before I got hold of a Vitus aero post, just ground a small flat onto it where the grub screw sat.

 

[bikeworkshop]

I've just found what I am pretty sure is a Vitus post 25.0 with the grubscrew flat spot.
I'll put up a photo later. it's about 200mm to the rails