I would add, use all the functionality as soon as possible to find any issues. I took delivery of an MX5400 with BH92 and Laneshark.
The BH92 leaked badly, after 10-15 min of use with digging, not just moving it around in the air. 3 hydraulic valves are bad which they are replacing the whole BH92 hydraulic control block.
Trips back and forth are an inconvenience for me, not to mention being without the tractor to do work.
Also found a slow leak, bad hydraulic crimp on a hose once using the Laneshark for a few hours, it was slow leak that only was apparent after some use. If it did not puddle, I would probably have said normal hydraulic fluid couple drips and walked away.
I know this could happen with anything, I do not blame the dealer, but I think it would be important to use the attachments and implements as soon as possible after taking delivery.