Reason for the amendment is to ensure pre-calibration, dual screen, and to add tripod. Topcon GM-52, Part Number: 1023562-04 Pre-Calibrated, Reflectorless Total Station 2 in Accuracy, Dual Display w/ keyboard, Optical plummet, No BT, Includes: One battery, charger, tool kit, Sunshade, Hard carry case per Theodolite. SitePro dual clamp Tripod, part #01-HVFG20-DCB-Must be compatible to Theodolite. Must be able to come onsite to Fort Novosel to train 4 students on the equipment.