Hold on them extension poles there are worth money!
Because the new Shangri-La 3 only comes with the centre pole with sprung clip and no walking pole extension. So if you don't want it, offier it casual like, over on Outdoors Magic and get ready to have your hand snapped off at the armpit!
Golite aren't doing an extension pole this year, and there is talk from folks to use a short Alpkit carbon fibre section which you can buy from them, but I haven't worked out how to do it just yet.
The new centre pole I don't think is a flexible as the old one, which would adjust to any height to suit the terrain, but Golite don't seem to be listening to the Bushcraft community needs as much as I would like. I'm having a meeting with them in July and will forward any suggestions for improvement to the Hex3/Shangri-La 3 if you have any.
They have added a tab on the door now which means you can prop it open, but I'm not sure if they have increased the size of the top vent cover to stop the horizonatl rain coming in.
Also anothe top tip; Buy a motorcycle side stand plate (which stops the bikes sinking into the warm tarmac) and use it underneath the pole. It prevents it sinking into mud!