I'm using a hip adductor machine to stretch my legs for splits. I set the angle selector to 3rd position from maximum, set weight to 65kg, and allow it to apply pressure to stretch my legs for 2 minutes while slightly vibrating my legs by flexing leg muscles. Then I rest and switch to 95kg load and repeat. Then I set angle selector to 2nd from max (since my legs can already stretch beyond the angle of 3rd position) etc... I also apply additional gentler pressure with my arms to further stretch my legs. I don't risk going beyond 105 kilograms of machine weight to keep control.
I've had a lot of martial arts training when I was 13-22 (10 years ago), that included stretching, though I never reached full splits. My body is in good shape in terms of muscle tone and cardio. I've been doing this kind of stretching for a month and it looks to be working, while not causing any issues.
Does this stretching make sense? Are there any known dangers for this particular stretching?