Here is the way I did it. There are probably faster methods if you are proficient in plastic body removal.
1. Place bike onto center-stand and set a block under the rear wheel to take the weight off the strut.
2. Remove clamp bolt at the strut base and pull out blocks.
3. Spend 2 hours with a ratcheting wrench removing the upper bolt with .5mm strokes; Or find a way to pull the plastic cover panel and use a ratchet.
Would be glad to hear how it goes. Good luck.