Here are several that I've bookmarked for reference for my upcoming Fathom project:
https://pinside.com/pinball/forum/topic/hep-this-week-9-17-18 (HEP's thread has several)
https://pinside.com/pinball/forum/topic/fathom-deep-dive-restoration
https://pinside.com/pinball/forum/topic/project-paragon-breathing-life-back-into-the-beast (Tractordoc shows several pins in this thread, including a great Fathom build)
https://pinside.com/pinball/forum/topic/bally-fathom-shop-job
https://pinside.com/pinball/forum/topic/fathom-if-you-cant-find-one-build-one
https://pinside.com/pinball/forum/topic/pmd-–-fathom-restoration-let-the-spending-begin