Coilovers.. Again but few different questions.

[Staticjack]

Basically going to be building a set for the gl5. Few things I'm unsure about.
Bottom ball joints what size are they as I'm going to be running ball joint extenders
And spring rates anyone running golf coilover springs what does it ride like?
If anyone has the links saved to the guides anywhere that would be helpful I know there are a few bit can only find one.

Need to be laying frame any ideas would be greatly appreciated need to get of fecking low and static.

Thanks
Jack