I see. Yes, I misunderstood you Jc4659 or just misread your post.
I have two JBs. My MacMini has 4 USB outlets - 2 each from two USB buses - one is a high speed USB bus and the other is a standard speed USB bus. What I have found after experimenting is that I like best having the USB cable run out of the JB into my USB converter. And for this the regular speed bus seems best. I have the other JB in the high speed bus which seems to do better either not being used or being used for my external drive.
I have two JBs. My MacMini has 4 USB outlets - 2 each from two USB buses - one is a high speed USB bus and the other is a standard speed USB bus. What I have found after experimenting is that I like best having the USB cable run out of the JB into my USB converter. And for this the regular speed bus seems best. I have the other JB in the high speed bus which seems to do better either not being used or being used for my external drive.