Unless the exchange spec has changed you lose some functions with their metal wiper stalk conversion, the variable delayed wipe I believe which I for one would not be without.
I have this stalks from Morganpark installed.
I have got the original black switch for the variable delayed wipe as an extra Accessoires.
It is now mounted under the dashboard.
On my 4/4 I only had to make a kind of "pre setting" once on the original (LR) switch.
Now I only need to turn the Morganpark wiper stalk less or more.
Of course I'll make a photo If someone is interested