[DaninVan]

Bradley; are you referring to the guide rods on the edge guide? If so, the Bosch 1617 uses 1/4" rod. But that doesn't help you with the distance apart.

 

[DaninVan]

Ahhh; never seen that accessory before. It runs on some kind of rail, which is what you were referring to? OK, found it but it's in Britain!
https://shop.bosch-professional.com...ssories-fsn-ofa-32-kit-800--34897--1600A001T8

 

[DaninVan]

Is this of any use?
https://pt-pro.resource.bosch.com/media/fsn-ofa-32-kit-800-34897-original-pdf-332993.pdf

 

[DaninVan]

Apparently the rails are available in the US...
https://www.boschtools.com/boschtoo...onal&exact=false&pageSize=20&type=ATTACHMENTS

Sorry, doesn't really answer your Festool question.