Hi, I had a 3/5 inch Vidal Sassoon curling iron my friend let me borrow because it was the only one who could make amazing curls in my hair and actually keep them there. I've used many curling irons and I can't find any like that one. Hers is a model VS135. I have long and very thick hair. Most curlers make nice curls, but then they drop a lot throughout the day (or sometimes, the hour). Do you guys have any recommendations?