I have a fully working one from a 350Z HR which was divorced properly from the donor vehicle which will work in your HR once programmed.
Just drop me a PM if I can help further.
Check that the belt is not slipping and get the charging rate checked from the alternator, probably a diode on its way out.
Fully working guaranteed alternators are in stock and if required just drop me a PM.
Alex.
Okay, for starters:
Year of first registration?
Coupe or Roadster?
Auto or 6 speed manual?
Number of owners?
Modifications and upgrades?
FSH?
MOT history?
Has the car been in storage?
Any previous accident damage or paintwork?
Location for viewing?
You have it around the wrong way:
If your car is running rich you have too much fuel to air.
I have all the parts in stock to fix your list of possible faults.
The gasket for the TB is reusable providing it is not damaged.
Just drop me a PM if I can help further.
Alex.
From the gearbox specialist that you entrust with the job or from myself or from your local Nissan dealership.
Now let's get David's thread back on topic please.
If you require further assistance with your gearbox fault then best to open your own topic.
If you use the correct torx size and have the tool at the correct angle then damage should not happen, however, if it does then some suggestions here:
https://www.google.co.uk/search?ei=xiR3W5SbKOWdgAbQ3KLIBg&q=removing+damaged+torx+screw&oq=removing+damaged+rorx&gs_l=psy-ab.1.0.0i13k1.40761.54708.0.56786.32.32.0.0.0.0.197.3086.25j7.32.0..2..0...1.1.64.psy-ab..0.31.3005...0j0i22i30k1j0i67k1j0i131k1j0i3k1j33i160k1.0.7fW2kqQADb0
Yeah, the old plastic ones are now obsolete and been replaced with an upgraded option.
I have these in stock or you can get them from your local Nissan dealership which will save you on shipping cost.
Providing your hydraulics are good and your clutch is clearing and you are not to quick on your gearchange then the issue will probably be the synchromesh.
So the answer to your question is No, but the gearbox will have to be removed and stripped to fix the issue.