OK... now i have another problem i must change Contrast spring because original is "slippy"??? (i don't know how to say in english exactly)
but here's the question... should/can i use polini evo gold spring? and local pro said that i should also change rolls (right now i have Polini original rolls, actually i dont know the exact weight) and wich kind of rolls should i use?
You can better use a polini "gold" or something like that..
Evo spring is much to strong for your setup.
The brand of your rolls isn't that important !
What weight in the rolls is something we can't predict, that's something that you have to test again and again (different rolls)..
The combination of rolls that you think that gives the best result, are the one that you need to use ofcourse..
just change the Contrast spring first & see what happens, you can buy & change the rollers later after you feel the results of the spring change, try a Malossi Yellow contrast spring.