Richard, here is the portion of my SOC-3's panel.cfg file with the COP3 gauges. My RCBCO-3 set-up works fine with these entries and I can reposition and/or enlarge the panel and the cat and tailhook functions still work. Do you have all of the RCBCO-3 gauge package in its own dedicated COP3 folder in your FSX main Gauges folder?
//--------------------------------------------------------
[Window02]
Background_color=16,16,16
size_mm=52,12
window_size_ratio=1.000
position=7
visible=0
ident=10080
nomenu=1
window_size= 0.045, 0.015
window_pos= 0.550, 0.020
gauge00=COP3!ControlPanel, 0,0,52,12
//--------------------------------------------------------
[Vcockpit01]
Background_color=0,0,0
size_mm=1024,1024
visible=0
pixel_size=1024,1024s
texture=$SOCVC
gauge00=Lockheed_Vega!magnetic_compass, 452,359,125,125
gauge01=Lockheed_Vega!altimeter, 697,467,125,125
gauge02=Lockheed_Vega!asi, 217,467,125,125
gauge03=Lockheed_Vega!turn_and_bank, 454,505,125,125
gauge04=Lockheed_Vega!vsi, 104,673,125,125
gauge05=Lockheed_Vega!ap_ahi, 798,651,125,125
gauge06=Lockheed_Vega!rpm, 450,654,125,125
gauge07=Lockheed_Vega!manifold_pressure, 288,678,90,90
gauge08=Lockheed_Vega!cyl_temp, 654,679,90,90
gauge09=Lockheed_Vega!oil_temp, 59,887,90,90
gauge10=Lockheed_Vega!oil_pressure, 190,885,90,90
gauge11=Extra_XML!ignition_switch, 337,927,60,60
gauge12=Beech_Baron!Panel Lights, 620,923,30,48
gauge13=Beech_Baron!Nav Lights, 674,923,30,48
gauge14=Beech_Baron!Landing Lights, 729, 923 ,30,48
gauge15=COP3/WindowStatus!window_status, 0,0
gauge16=COP3!WindowInit10080, 0,0
gauge17=SimIcons1024!Radio Icon, 650,831,25,25
gauge18=DeHavilland_Beaver_DHC2!fuel, 456,845,125,125
gauge19=COP3/CarrierZones!dsd_carrier_zones,0,0
gauge20=COP3/Config!config, 0,0,,, ./gauges/COP3/Config.ini
gauge21=COP3/Sound!dsd_xml_sound3, 0,0,,, ./gauges/COP3/Sound.ini
gauge22=COP3!Arrester, 0,0
gauge23=COP3!Catapult, 0,0
gauge24=COP3/SpeedControl!xml2ipc, 0,0
gauge25=COP3!SonicBoomControl, 0,0