Name: IMG_20170518_204907.jpg Date: 2017 May 18 Size: 1.37MB ---------------- OTA in Mount (optical tube assembly) The acorn nuts on tube fit through the base plate. The metal standoffs are bolted to the base plate with 1_4-20 tpi hex head bolts. The black plastic (3_8" UHMW scrap) tabs keep the tube from falling through are also attached with 1_4"-20 tpi machine screws. The metal standoff provide about 5 pounds of counter balance.