Hello everyone I would ask about the strings Original Flat Chrome Solo. I heard that these strings are very hard and vibrato becomes a little difficult to implement. Have some experience with these strings? I think OFC Solo have normal tension, but they seem very hard on touch, stiff right hand. Do you think that the strings Original Flat Chrome Solo are hardest than the Thomastik Spirocore Solo, for example? I would like to know your opinion on this or is it just a matter of habit. Thanks for your answers, is very important. PS.: I have also tried Spirocore Solo (don't like on my d.bass) Belcanto Solo, Flexocor Solo, Permanent Solo and in terms of projection and sound quality, it seemed more appropriate the Original Flat Chrome Solo strings for my doublebass, my doublebass is a little bit bilhant .