Thinking about installing the Sta-Bo stabilizer on my 07 Road King Classic but not sure about which model to use. Their website shows version 2 and version 3 both fitting my bike but the version 3 is twice the cost of version 2? Their website is not very informative and does not show installation instructions. Has anyone recently purchased and installed this product? Looking for comments on installation, which version and most importantly, does it work as advertised?