battery_keeper_tab_top_z = battery_nutbox_z
+ battery_keeper_z_gap_nutbox + battery_keeper_m_th;
+
+battery_keeper_legs_top_z = battery_keeper_overhang_z
+ + battery_keeper_overhang_th;
+
battery_keeper_frame_top_z = battery[2] + battery_keeper_m_th;
module BatteryPlan(){