I've used hump jumpers for years and they are the best. You can put them in front or in back of the foot or do as I do and move from front to back and any machine will sew right over those thick spots with no problem. As Sewingpup said, I have very little problem with my Berninas but some of the other machines aren't as good at thick seams and the hump jumper solves that.
Mine is very old but this seems to be similar
https://www.wawak.com/sewing/sewing-...ts#sku=prt6101
Its also sometimes called a Jean-Ma-Jig