diff --git a/coordinator/process.lua b/coordinator/process.lua
index 9df2884..d74ea97 100644
--- a/coordinator/process.lua
+++ b/coordinator/process.lua
@@ -316,13 +316,11 @@ function process.fac_ack(command, success)
 end
 
 -- handle a unit command acknowledgement
----@param unit any unit ID (invalid index protected)
+---@param unit integer unit ID
 ---@param command UNIT_COMMAND command
 ---@param success boolean if the command was successful
 function process.unit_ack(unit, command, success)
-    if pctl.commands.unit[unit] then
-        cmd_ack(pctl.commands.unit[unit][command], success)
-    end
+    cmd_ack(pctl.commands.unit[unit][command], success)
 end
 
 --#region One-Way Commands (no acknowledgements)
diff --git a/pocket/pocket.lua b/pocket/pocket.lua
index f53a60e..907b162 100644
--- a/pocket/pocket.lua
+++ b/pocket/pocket.lua
@@ -654,7 +654,36 @@ function pocket.comms(version, nic, sv_watchdog, api_watchdog, nav)
                 if protocol == PROTOCOL.SCADA_CRDN then
                     ---@cast packet crdn_frame
                     if self.api.linked then
-                        if packet.type == CRDN_TYPE.API_GET_FAC then
+                        if packet.type == CRDN_TYPE.UNIT_CMD then
+                            -- unit command acknowledgement
+                            if packet.length == 3 then
+                                local cmd = packet.data[1]
+                                local unit_id = packet.data[2]
+                                local ack = packet.data[3] == true
+
+                                local unit = iocontrol.get_db().units[unit_id]  ---@type pioctl_unit
+
+                                if unit ~= nil then
+                                    if cmd == UNIT_COMMAND.SCRAM then
+                                        unit.scram_ack(ack)
+                                    elseif cmd == UNIT_COMMAND.START then
+                                        unit.start_ack(ack)
+                                    elseif cmd == UNIT_COMMAND.RESET_RPS then
+                                        unit.reset_rps_ack(ack)
+                                    elseif cmd == UNIT_COMMAND.SET_BURN then
+                                        -- this also doesn't exist
+                                    elseif cmd == UNIT_COMMAND.SET_WASTE then
+                                        -- updated by unit updates
+                                    elseif cmd == UNIT_COMMAND.ACK_ALL_ALARMS then
+                                        unit.ack_alarms_ack(ack)
+                                    elseif cmd == UNIT_COMMAND.SET_GROUP then
+                                        -- updated by unit updates
+                                    else
+                                        log.debug(util.c("received unit command ack with unknown command ", cmd))
+                                    end
+                                end
+                            end
+                        elseif packet.type == CRDN_TYPE.API_GET_FAC then
                             if _check_length(packet, 11) then
                                 iocontrol.record_facility_data(packet.data)
                             end
diff --git a/pocket/ui/apps/control.lua b/pocket/ui/apps/control.lua
index cc533d2..c76b95a 100644
--- a/pocket/ui/apps/control.lua
+++ b/pocket/ui/apps/control.lua
@@ -154,6 +154,7 @@ local function new_view(root)
             local set_burn = function () unit.set_burn(burn_cmd.get_value()) end
             local set_burn_btn = PushButton{parent=u_div,x=19,y=8,text="SET",min_width=5,fg_bg=cpair(colors.green,colors.black),active_fg_bg=cpair(colors.white,colors.black),dis_fg_bg=cpair(colors.gray,colors.black),callback=set_burn}
 
+            burn_cmd.register(u_ps, "burn_rate", burn_cmd.set_value)
             burn_cmd.register(u_ps, "max_burn", burn_cmd.set_max)
 
             local start = HazardButton{parent=u_div,x=2,y=11,text="START",accent=colors.lightBlue,dis_colors=dis_colors,callback=unit.start,fg_bg=hzd_fg_bg}
@@ -161,6 +162,27 @@ local function new_view(root)
             local scram = HazardButton{parent=u_div,x=2,y=15,text="SCRAM",accent=colors.yellow,dis_colors=dis_colors,callback=unit.scram,fg_bg=hzd_fg_bg}
             local reset = HazardButton{parent=u_div,x=12,y=15,text="RESET",accent=colors.red,dis_colors=dis_colors,callback=unit.reset_rps,fg_bg=hzd_fg_bg}
 
+            unit.start_ack = start.on_response
+            unit.ack_alarms_ack = ack_a.on_response
+            unit.scram_ack = scram.on_response
+            unit.reset_rps_ack = reset.on_response
+
+            local function start_button_en_check()
+                if (unit.reactor_data ~= nil) and (unit.reactor_data.mek_status ~= nil) then
+                    local can_start = (not unit.reactor_data.mek_status.status) and
+                                        (not unit.reactor_data.rps_tripped) and
+                                        (unit.a_group == 0)
+                    if can_start then start.enable() else start.disable() end
+                end
+            end
+
+            start.register(u_ps, "status", start_button_en_check)
+            start.register(u_ps, "rps_tripped", start_button_en_check)
+            -- start.register(u_ps, "auto_group_id", start_button_en_check)
+            -- start.register(u_ps, "AutoControl", start_button_en_check)
+
+            reset.register(u_ps, "rps_tripped", function (active) if active then reset.enable() else reset.disable() end end)
+
             --#endregion
 
             util.nop()