Mounted one in my 20yo 335. After 2 weeks or so it simply failed: from pos 1-2-3 it was still acceptable, but in reverse the lever got stuck in 3, and next it skipped 2 to pos 1. First I thought I was wrong. So: switch plus all the rest out again. Believe me, a LOT of work.
Now people Thomann asked me to show them a small video of the defect (with one hand, switch in the other).
Few days later Thomann sent me a replacement, very polite, friendly and fast.
Thank you Thomann! 5* for you, but Switchcraft...
And this one works like a dream.