I'm almost finished putting together my vacuum pump build but haven't decided whether to install a couple of auxiliary filters or rely on the internal ones inside of the Gast pump. Most of the builds I've seen on the forum include the additional filters but can't figure out why as the internal ones seem robust enough. Any comments or suggestions?
Shown below is the partially complete setup that I put together. The design is based on another forum member's build.
Projects 002.jpg
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