Just to note the Japanese article on f1 rc down force showed the f103 to produce nearly double the down force of the 104 at 30mph in stock form.
With the trg advance rear wing and a diffuser it was over double the down force of the 104.
And to note the trg wing was on it's lowest down force setting.
The trg wing has far more down force on steeper settings!
Plus there are much higher down force wings for the front wing than a stock 103 wing.
I'm guessing my 103 with it's aero setup is producing somewhere between 170 to 220 gram of downforce at 30mph.
Where as a 104 is about 85g
How much difference this makes I'm not sure?
But any advantage works for me!