LED clipper asymmetry question... less asymmetric?

[screamersusa]

  I'm modding a Mosky Plexi-m closer to a 2204. I changed the gain pot to 100k (where I like it),
and removed the single SMT LED replacing it with wires for a new diode stack.
I prefer symmetrical clipping so I utilized 2 small red leds in place of the SMT single.
I believe the circuit is the same in the Tonecity Model M which was modded in a similar fashion and
I do like it alot. They will each have homes in different rigs.

 My question is regarding the asymmetrical clipping of the 3 diode setup which has some tones I like. Once converted to 4 LEDS, If I replace the original double pair with matching small leds, would a small resistor in series add  slight bit of the asymmetry back in?. I think I'd like a touch of it but no where as much as you get with the 3 diode setup. What value would one use for 1/2 to 1/3 of an additional diode and does it matter which end of the diode pair it goes?
In other words reintroducing a touch of asymmetry that does not screw up higher gain.
I should point out I play rhythm and don't mind "Not cutting through" as much. The 3 diode asymmetric config does seem to "cut" better in an attention grabbing way. Not usually my job....

[screamersusa]

   I forgot to ask:  Is there a big difference between the smt red leds and the small standard ones?
I ask in case I decided to not add asymmetry as the led pairs might be different enough.