Rail (750Wh) Vivid ultimate on a rail

[Hughesy-p]

I have a 2022 model 23 year rail 9.8 with a 750 battery in large. Is there anyone on this forum who has fitted a vivid ultimate to the same bike? I'm just after info on clearance with the piggyback on the frame as I've just purchased one and are now having doubts

 

[alexiow]

I’ve seen few people fit to a large. I have a medium. Information is all very confusing tho so good luck!