I also have 48t, for a year now, had to add 1 link to the chain. Did you install speedbox 3, was it worth it, can you explain how is it behaving now?
Thanks
Very little chance somebody already 3D printed it, but I will ask anyway.
Looking to replace bottle holder with spare battery holder for CANYON GRAIL:ON
Any other options? I did 2 long rides with battery in backpack. Next time will try under-saddle bag