I have a question: when I observe other peoples' bugs and trugs at races, they all seem so much more feathery responsive than mine. Mine's more load-up, point, and shoot.., whereas these other cars seem so much more modulated and responsive to the smallest throttle inputs. I know clutch setup is key, as is the rest of the setup. But I'm wondering if what makes the most difference is the venturi. I recently went down from a 9mm to a 7.5 in an LRP 30 truggy engine, and it seemed to make a positive difference along the lines of what I want. I ran my RB Fire 11 (C5TGC, 2058) in my RC8.2 buggy last weekend, and it was definitely lacking in the feathery responsiveness I'm talking about. Anyway, I was just rummaging around, and found some other NR venturis - 8mm and 7mm. I've gone and put a 7mm in. So my questions are:

1.) What kind of performance difference can I expect?, and
2.) How will it affect the tune?
3.) I have a bunch of Picco venturis. They're shorter, but the width feels right. Can I use them? (I'd like to try a 7.5 first instead of the 7mm, but only have a 7.5mm Picco venturi..)

I actually don't care all that much about run-time. I just want power, but with that responsiveness and hair-trigger feel... Thanks.