https://www.avalonsmarthomes.com/product-page/r-shelf-3uc
R-SHELF-3UC | Avalon Smart Homes
Universal equipment shelf, vented - 3U high (5.25"), compatible with R-CLAMP
rshelfavalonhomes
https://gardnerspares.com/product/3uc-reverse-and-reducing-gear-spares-manual/
3UC REVERSE AND REDUCING GEAR SPARES MANUAL - Gardner Spares
May 12, 2026 - Illustrated spare parts manual for the 3UC reversing and reducing gears. Physical Copy.
reversereducinggearsparesmanual