Finally completed this model, after starting it back the summer of 2018. My first large scale Tamiya kit and I'm absolutely blown away by how good this was. For those who have never built one of these kits, you have to treat yourself! My subject is "My Nel III", a late war Corsair assigned to VMF-511, flying off the USS Block Island. Decals courtesy of the truly awesome Fundekals set.
Here's a full list of all the corrections and updates I incorporated into my build. Not saying it's the complete list of every modification the kit needs or that all of these are even necessary. Some are just to update the kit to the late -1D variant I was building. Just posting in case it helps anyone else.
cockpit flare gun deleted entirely
Delete upper wing ID light
Delete lower wing landing light
Add left side armor plate (installed to protect the pilots throttle arm)
Add under seat armor plate (installed when the Corsair gradually started performing air to ground missions).
Add left side windshield hand grip
Add a thin metal bracket on top of seat for seatbelts
Fill in cockpit vent in fuselage (this mod was only seen on post-war Corsairs, with maybe a few limited exceptions).
Fill in wing fuel tank fill ports (these tanks were deemed an explosion hazard and were gradually eliminated from later production runs).
Drill out cockpit frame lightening holes
Add rudder pedal adjustment levers
Added multiple hydraulic lines on forward cockpit bulkhead
Added pins and retaining cables for pilot's back armor plate
Drilled out top tubes on pilot's seat mounting frame
Removed moulded on seat adjustment lever and replaced with scratchbuilt part.
Drilled out lightening holes on footrest support frames.
Added multiple electrical lines underneath instrument panel and side consoles
Used awesome Barracudacals cockpit decals
Used thin acetate between kit instrument panel and decal, instead of thick kit clear part
Added hydraulic line to cockpit accumulator
Added large heating duct to right side of cockpit
Added stubs of pencils sticking out of map case
Used pilots oxygen hose, to run from regulator
Thinned levers on throttle assembly
Drilled out opening of pilot's relief tube and added drain hose
Added HGW harness instead of kit PE
Added bomb emergency release lever on left side of console
Added very basic 2D radio behind cockpit seat
Added multiple electrical cables to radio and IFF control boxes on right sideway of cockpit
Added rocket control panel (kit part R-44 but not shown in instructions)
Added rocket firing handle on upper left side of cockpit
Added electrical lines for MG switches on glareshield
Sand down the fabric stitching on wings and control surfaces
Added Vector cowling set. Fiddely but in my opinion, well worth it if you are leaving the cowl flaps open
Added cowl flap actuator rods and linkages
Added engine ignition lines, with clips to hold the lines together
Added oil drain line on bottom of crankcase
Added curved oil lines at top of cylinders (see my comments above)
Added larger diameter lines that connect cylinder tops to each other
Added electrical and hydraulic lines to main landing gear bays
Carved out openings at bottom of main landing gear retraction struts
Drill out lightening holes in main landing gear bays
Thinned kit exhaust openings
Opened lightening holes in sides of flap panels
Open up lightening holes in LG oleo scissor links
Added Barracuda resin wheels
Added ignition "pigtail" leads to HVARs
Added Brassin resin 500 lb bomb in lieu of kit 1,000 lb bomb (thanks Jennings!!)
Added arming wires to front and rear bomb fuzes
Added scratchbuilt wingtip navigation lights
Added multiple hydraulic and electrical lines to wing-fold area
Added emergency release handles and linkages to interior of canopy frame.
Used those awesome Fundekals decals.
If anyone's interested, the full build is over on the WIP forum: