What projects or things could I research if I wanted to create my own DIY servos?

I was wondering if there was a way I could create my own servos in order to lower costs.

https://www.instructables.com/id/Make-your-own-low-cost-servo/

I currently have been able to find this as a clear source I could try and replicate, but I’m curious if anyone else has tried or has any experience into something like this. Like, how bad of a quality downgrade should I expect assuming I don’t have all the advanced tools that a professional servo maker would have? Any things I should know before attempting to do such?

submitted by /u/mememachinedotexe
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