Hello and thanks to all
I put the Dominant after d'addario helicore hibrid light all is ok. But I perspire a little with the E string on which the silk windings end was going on the nut

but with the good intonation it is now (between the tuning peg and the nut )at 1 cm (0.39 inch)of the nut. Happy so.
I give you the length of the E string between the ouput of the string at the tailpiece and the silk windings end (in tension) : 128 cm (50.39 inch)
distance between the ball and the output of the tailpiece 1 cm
You should kwow the length of the string which the tunings peg closest to the nut ; for me the E string
I think it should be given by thomastick because all DB are different ; but with this length everyone should able to know where this fragile silk windings end will be on their DB before buying those dominant strings. Thomastik reply me this when i give them my present length
"Pierre:
Thanks for your email. Please refer to the attaché file regarding Dominant strings and their proper installation.{a picture saying the silk windings end should be between the tunings peg and the nut} If you follow these instructions then there should not be a problem with Dominants at all." So no more problem with dominant breaking hallelujah only bad installation
the sounding strings length don't help ; mine is 106.5 cm, so in the average
Like GriffithLéa said I LUBRIFICATE even double because I think this was the advertise of a woman (with a name like Léa


) ..... euh.. out of purpose.
The dominant are not so hard to play,on the contrary the stifness helps. I just put them a 1mm down on the bridge and i think they're more confortable to play than the Hybrid light ; especially after the third position. "Airbass" afraid me saying he takes the dominant solo for working the thumb position" On my DB the thumb position is even easier than with very light strings. And "Chris" that replace the E with stark E

afraid me a lot more. So don't be afraid of their stifness.
I put them on my bass five days ago and they still sound a little metallic and superficial. I give them time.
But very comfortable to play and more focused and a bit louder than my previous d'addario hybrid
hope this will help someone