I rode a friend's Luna Apex with Rohloff some years back. It didn't have the Chain Guide, but it did have a derailleur! I asked about why it still had a derailleur when it had only one cog in the back and the owner said it was to have tension on the chain so it didn't fall off during hard suspension changes. It looked silly to me, but it apparently worked.4/27/23 - Last Installation piece, The Chain Guide
Haven't done that yet. I never had one when I was running a derailleur system, I did lose the chain every now and then when my rear suspension was bounced hard at speed. I will ride it for a few days to see how it performs without. I will install it in about a week. Not quite as simple on the carbon fiber frame as with an aluminum frame.