Shimming is from all times. Basically: since there are DE's, there are shims. Some were done as we do now, we find our own stuff to put in our razors, some were professionally designed and marketed.
Such as the Viku Dauer-einlage, the "Lasting Inlay". Piece of (intentionally) pitted metal, intended to creater larger blade-gap, which, according to the cheering flyer, would lead to less clogging, more efficient shaves and longer lasting blades. Invest in this, and you'll lose less money, is what they promise. Even then: classic shaving will save money!
Such as the Viku Dauer-einlage, the "Lasting Inlay". Piece of (intentionally) pitted metal, intended to creater larger blade-gap, which, according to the cheering flyer, would lead to less clogging, more efficient shaves and longer lasting blades. Invest in this, and you'll lose less money, is what they promise. Even then: classic shaving will save money!