[Scott8mm]

I was wondering if folks here could describe the differences between the two and four pin models. Mine is a 2010 two-pin model and I'm pretty familiar with the insides. Do the extra pins provide more stable or precise alignment? Are there other differences? Thanks for any insights.

 

[BCM_87]

I haven't the slightest idea, but yes, you are right that there are definitely 2 as well as 4 pin frames out there. Maybe call CS and ask?