BOB WALKER posted:The Servo article is on p.52 of the September 2106 CTT. My Gas & Go article was in the February 2016 issue. Hope you can locate it. There was also an article about servo applications for model railroads in the May 2014 issue of Servo magazine.
The least expensive manual servo driver I've used was $5.00. If you can get an Arduino for $2.50, I'd say go for it!
Thanks, Bob! The servo testers from overseas look like this: