@Dunbar what you see is just the stock seat post clamp without its lever. I'd hoped to find star fasteners or some other unusual type to replace the allen screw since just about everyone has a set of allen wrenches, but no luck so far in my small city. I'll probably fill the allen head in some fashion as discussed
here (see below for more detail). As for your battery Q, you sound very committed to running at top speed, so the largest battery seems like a simple if more expensive choice to make...if those distances and that speed are what you see in your future. Presumably, the larger battery will require a higher amp-rated charger, and so it might be a bit bigger & heavier as well.
@EriderM the mounting points on the dropouts are not even. The right side is mounted higher than the left tho' they are even, fore & aft. To accommodate the higher mounting point, the rack's supports on the right side were bowed out a bit to keep the rack level.
This is from the website linked above:
"You can make a standard clamp difficult to unscrew by filling the socket with something that prevents a tool being used to loosen it. Whatever you use, it should be difficult to remove. But the thing to remember is that the more difficult it is for a thief to remove, the more difficult it will also be for you should you want to make some adjustments.
What to use? There are a few different options. For example, super gluing a ball bearing into the socket is a popular choice. Simply find a ball bearing that fits snugly into the socket, slather it in super glue and press it into the socket. Should you later need to remove the ball bearing to make some adjustments, you can use acetone or Z-7 Debonder to dissolve the glue.
Other materials you could use to fill the socket include steel epoxy, solder, Sugru or candle wax. Each one provides a different level of security depending on how difficult it is for a thief to remove. Don’t forget, the more secure it is, the more difficult and frustrating it will be when you need to remove it! But in fact, this technique is very effective and can be used to secure any of your bike components."
I had no idea '
Sugru' was a thing.