Replying to ON3P Kartel 108 questions

Hey bois,

So I know NS loves kartels just have a couple questions about them. I was thinking of getting custom stiffer Kartels
I ski whistler mountain and have been in search of the "Playful charger" never ridden a stock Kartel but im worried they might be too
soft. Would getting the stiffer carbon make them more stable, does it have any downsides? Im not throwing any tricks or buttering if it helps
Im also 5,10 and 145 lbs thinking of going for a 181

Thanks guys