Added tuning to an object but the footprint is wrong

Hi everyone - I am in the process of creating my first ever mod so please excuse my total lack of knowledge.

I downloaded a DJ controller made by another creator (Pacosims). I didn't realise when I downloaded it that it was decorative only, so I'm now trying to add functionality so my sims can practice it. I've managed to add the right tuning (object_DJBooth_LowEnd), and my sim can click and have the correct options come up in the menu, however she can't use the object. She just stands there waving with the object in her thought bubble

I gather this has probably got something to do with the footprint? Could anyone point me in the right direction to fix this? I've copied the Rig/Slots from the "Turn-Table-Top Tote" DJ Booth and added them to my package and mapped the position of each of the bones to my object using the X and Y fields but that hasn't seemed to help.