Quoted from FtrMech:I broke the Herman plastic on my machine a few weeks back at which point I contacted Stern for a replacement...they sent one free of charge but along with the plastic was included this smaller stainless plastic protector...I believe this will not only protect the fragile Herman plastic but also keep the wire-form from bending and protect that opto. It think this will eliminate the need for that 3D printed block. I had not seen this mentioned here so I thought I would post it. I have to credit Stern with some great customer support here especially to include the upgrade.
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Nice, I just got mine from Stern too, same thing happened!