Sending a 110 lb amp to the manufacturer for cleaning/calibration. Good idea? How to ship?

Get a custom flight case made for about $400.00.

If you're servicing the amp, change the electrolytics. If you're not servicing, why open and change caps? Makes no sense for a 5 channel amp! Save your money and buy some separates. Amplifier, preamp along with a surround sound processor if that's what you want. Again, Simaudio is pretty good, I'll bet most caps still test in spec. This unit has 216,000 mfd capacitance in power supply. I've been fixing stuff for 50 years!

Hoping you take MC's advice....I cringed and smiled as I went through his sequence of events.  He is spot on!

I share this as a just how frustrating box shipping can be.  I know your package would not be as susceptible as my my company's but just an example.

One of my customers had a demo piece of equipment I sell.  It is essentially a 50lb egg about 16in diameter.  They saw the driver struggle to get it loaded on its Priority Overnight trip back to my house.  5 days later my regular Express driver casually strolled up my front steps(I saw him while on the phone and wondered...how???).

After my call I went outside and almost threw the box against the ceiling in picking it up.  It was empty!!  The $6000 piece of equipment, its power cord and the bottom section of packing were gone and a new diagonal piece of tape across the bottom flaps.  

At some point from pickup driver to delivery driver the damn thing fell out and the jerks just taped up the box and scanned it.

I am in the middle of the claims process now.  I have been very fortunate when shipping audio components out of necessity but man oh man it always makes me nervous!

If it is working correctly and you are happy do not waste your time or money shipping it because you may never get it back again because of sipping problems/issues because of its size and weight.

He is making the correct decision. He will drive it there.
only 4 hrs away. 
   If my amps go, I have a 1,200 mile drive to Cali.