Dark17, try using about a 3mm spacer just before the top cap and see Pat Leno's recommendation re a .25mm micro spacer in this thread. The spacer before the top cap is just in case you did not cut the steerer short enough, to prevent it from rubbing against the top cap
My mechanic suggested to sand this part because it was rubbing against the headtube when we set the preload until no headset play occurs. I already asked Melinda if it is advisable but I guess I will have my reply on monday.
For the performance review of the frame, I did a ride on some of my usual routes (albeit a shorter one) and all I can say is, the bike is fast! Really good on climbs despite being an aero bike. Really aggressive frame but with the proper fit and some long rides to get used to the geometry, it will be a really good racing bike. TBH if I don't have an experience on disc brakes, I would crash the eff out on descents because this bike descends real fast.
Overall, the bike is really fast on flats and descends and descent on climbs, tho I still need to get used to the geometry of the frame by doing a proper bike fit and doing more endurance rides to get used to the frame.