SCT versus random orbital sander?

I bought a SCT a few months back (Bauer from HF). It does its job very well, especially on steel I'm using to build my gates. It also makes quick work of old Bondo. It does not, however, replace a DA or orbital sander. They are for very different jobs. Pic of my new gates. I'm going to be building something similar on the south side of our house.

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