Several Dumb Questions About Submitting To CAC For Grading.

I got a CAC offer for a $25 membership, so I decided to join. I have never submitted a coin to them, so I started working through their digital forms. I want to understand their variety attribution process, so I picked a single coin: an uncirculated 1954-S Jefferson nickel DDR FS-801. I built the submission, but I decided not to proceed with a live test run because of several unclear points.

1. There is no selector for service tier on the coin. It is automatically assigned to Economy. I assume this was based on my estimated value of $100. This seemed odd to me, as different service tiers offer different turnaround times and add-ons. Specifically, the Standard tier seemed much faster and included the $5 coin imaging fee.

2. The order had a $35 shipping and handling fee. I assume this is what CAC will charge me to return the slabbed coin with insurance. However, other sections of their documents seem to suggest that CAC can charge additional insurance fees after grading?

The $35 seemed high, so I began adding more variety coins to the submission form. With 7 coins valued at about $1500 total, the $35 return fee had not changed. This made me question whether the $35 actually includes handling, insurance, and return shipping. Which leads me to:

3. What does the $35 s&h include and not include? Will there be more fees as an order moves through the process?

4. If the $35 is a flat fee of some kind, how many coins can you actually put on an order before that amount increases? It seems like a huge waste to eat that fee for a single coin (and maybe that's the point!).

And then an unrelated question on outgoing shipping:

5. When you send valuable raw coins for grading, how do you substantiate to USPS that the coins have the insured value? You don't yet have a slab to establish the value. And even if they accept the value and let you buy insurance, isn't there a danger that a lost package can have its insurance payout disputed after the fact? Is USPS even the right way to send valuable raw coins, or is there a different preferred shipper?

A final question:

6. The CAC website says that half of the $20 variety attribution fee is forgiven if the requested variety is correct. Is that actually true? If so, how is that money returned to the customer?