Changing Choke Pull Down Unit

[jswagger]

Hi,

I need to swap my existing choke pull down unit for a Brickwerks (budget) one. Has anyone done this before and can advise how it's done?

Also, how do you get the old one out/off as I can't budge it?

Thanks

E D I T: Managed to do it, will post a pic. later showing what you have to remove to get the old one out