Eibach 1000lb spring
Because I did the "Flip 'n Grind" mod to lower the rear end (about 1 3/4 inches) I was worried about bottoming out when riding 2-up. So a spring upgrade was needed.
Here's the rear suspension with the original spring (I think
around a 780 pounder is stock)

Here's the new 1000lb Eibach - note it's slightly shorter but
will work just fine

Here's the spring compressed with a Barons compression tool
(it kinda sucks - I may never have a need for it again!)

All put back together

...and installed

A side note: this is a good shot of where and why the pivot arm gets "ground" in the "flip and grind" mod. You can see how close the arm comes to the shock.