I guess I should report on Plan B. I canceled the Lectric Express with no hassle, and went with the Ride1up Turris.
It arrived very quickly with no apparent shipping damage. Assembly was straight forword, but slow. The only problem was that both tires would not hold air despite there being no leak in the tubes. The only odd thing was what I called a sewing pin with the head, not point, sticking out of the valve (I forgot that tubes have one of those, but it should be inside the valve, not sticking out.
I tried phoning Ride1up tech support, but was hung up on. I then emailed and the reply said the problem was probably loose valve cores. They sent a link describing how to tighten them. Unfortunately, the link was about removing them.
I then gobbled "tighten bike tube vale core" and learned something new, that there exists a valve core tool, a kind of screw driver which tightens and loosens valve cores. I found a Slime branded one on ebay for $2.70 with free shipping; and it arrived within a couple of days.
I used the tool to tightened the valve; and there has been no more leaking. So now I've got about 100 miles to show for it. I can only describe the ride as smooth. The only changes I'm considering are:
1. A slight stem extender: No problem with the seat height; but with the non-adjustable stem, I find myself in sort of a drop handlebar situation.
2. 2.0" tires: I found the 2.4" tires a bit strange after riding the Swagtron EB9 with skinny road tires. I could live with that; but I plan to do some touring via Amtrak; and they limit tires to 2.0" so that they can fit into the bike racks (I'm talking only about the new Venture cars on the Illinois, Michigan, and Missouri service). In general, there are 4 or 5 types of consists, each with slightly different requirements. I believe Amtrak has a system wide limit of 50 lbs., e-bike or otherwise. Ride1up claims 54 lbs for the Turris I'm sure the battery weighs more than 4 lbs.; so if i remove it, I should be OK.