I think that is all there is to it. I had to pull the headlights of the R58, I was worried that I would have trouble lining them back up when I reinstalled them but I didn't.
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Yup - 4 screws as described in the Joey How to article. https://www.motoringalliance.com/articles/joey-mod-for-your-gen2.80/
I cannot speak to the updated lights. Assume you are thinking of going with LED? If so, my guess is you will need to change the complete projector, not just the bulbs. Have you found a place selling replacements? -
Thank you for the link to the Joey DIY!!