Maximum dimension- 1.5 m

So I recently built a raised bed with dimensions- 59 in x 59 inch. (1.5m×1.5m)

The problem I have is that I cant reach the gantry mounted seed trays because the FB cant go far enough. Did I misread the max dimensions? Any possibility I installed this incorrectly?

Thanks in advance

Hello, maybe the link helps as an explanation?
Different Sizes

Thanks. I didn’t realize that and wish that had been called out in the documentation. I would have adjusted my width accordingly.