FAO James: You probably still have the best dropper post in the world. Crank Bros scrapped the Joplin coz it was rubbish, guess what? New Kronolog also rubbish! http://www.pinkbike.com/news/Crankbrother-Kronolog-Telescoping-Seat-Post-Tested-2012.html
Anyone who reads this, do me a favour. No matter how tempted you are by the design, DON'T BUY ANY CRANK BROS PRODUCTS! It's all made of cheese! I had some of their pedals that were poorly sealed and became squeeky after a couple of months, so if they can't even get that right I certainly wouldn't trust anything more complicated.