Lightning GT/GTX owners?
 

Hi there lightning lovers, can someone measure the diameter of the gear plate on the centre spur gear shaft please, I want to find out if it is the same size as the lightning diff cup and will fit Kyosho 46t plastic spurs, as a possible replacement for the centre diff in my Lightning based rallygame car.
Also what is it made of steel or alloy?

i am not sure i understand all of your questions, but i can tell you that the kyosho 44t & 46t plastic spurs are a direct fit for the lightning.
the stock lightning gt spur is a 50teeth spool (not a diff) and made of steel.

I had a Lightning 2 Pro buggy that I used as a basis for my carbon rallygame car, I currently run the kyosho plastic spurs on the centre diff which is filled with 100,000 weight oil to stiffen it up.

I would like to run a spool (what HB call a spur gear shaft) instead of the center diff, mainly to save weight, but also to reduce maintenance, my question is, are the 44t &46t Kyosho plastic spurs direct replacements for the 50t gear on the lightning gt/gtx spool?

Damn, steel, I was hoping it was alloy, is the steel solid or hollow? (anyone know what it weighs? either bare or with a plastic spur gear.) if its solid I may not save much weight over the center diff and will probably try to make a carbon fibre spool to fit the Kyosho plastic spurs as I had planned to before I heard these were available, I'm not sure how carbon diff cup connections will hold up, if they fail this will be a good alternative assuming the Kyosho plastic spurs fit.