Finally got a chance to run the new Big Bores + Kyosho springs Sunday and it felt......
The same! Lol... I did TQ and win my buggy class, so my buggy felt as it did with the v2, kyosho o-rings, and losi red pistons, and same kyosho springs. I'm not really sure if the upgrade is worth the $100, but I can say it won't make your car feel worst or different.
My 2 cents.