I searched on @Sila's "New Source bugs Master List" and found nothing about chairs y-axis not being fixed for new source. I cannot speak for all chairs with abnormal y-axis's but the "Pimp Chair" y-axis is still the same as old source, as shown here. But if I recall correctly in the closed beta for the new source, the "Pimp Chair" had a corrected y-axis to be as shown here. Like I said, I am not sure if all chairs with different y-axis's are fixed or if the fixing of these was scratched in the making of the new source, but just thought I would like to bring it up.