Sorry Eric but the pic didn't upload!
Seems to be a snag on the site at the moment☹️
Re Servo Tester,
Mine is a Robbe unit which as been working great for years.
Unfortunately Robbe is defunct. 😂
But if you Google RC servo tester
you should get many options.
There are also kits on the market to build your own.
If all else fails, and you can use a soldering iron😉, I can send you a circuit diagram for a tester based on the NE555 timer chip.
Cheers, Doug 😎