I bought a second-hand Command Post IR (3-position) off eBay a few months ago. It was slow to extend and would stop at the ‘cruise’ position rather than the ‘power’ position and I had to manually pull it up to full extension. I suspect that is why it was so cheap (£60). I put up with it for a while until it stopped returning at all during a trip to BPW.
I stripped it down, cleaned and re-greased it using some SRAM Butter. This improved things but it still wouldn’t return to the fully extended position without manual help. A second strip down, thorough clean and re-grease, including inside the inner tube, with Slick Honey and it is now operating like a brand new post.
I have set the pressure to 20psi. Spesh say it can go up to 25psi in cold climates but anything in excess of this could damage the seals.
The collar was extremely tight but I managed to get it undone by leaving the post in the seat tube and using a strap wrench.
I tried the included remote lever initially but couldn’t get it in a comfortable position where it didn’t foul on the brake lever bracket so replaced it with a Giant lever. This was much better but has now been replaced with a Wolf Tooth ReMote which is really good and in a great position.