Topeak or other rear rack for ST1? Disc brake width??

Im looking for a rear rack (in the USA) to use with my ST1 which did not come with a rear rack when I purchased it. Has anyone used the Topeak models that are currently available? I notice they sell a version which is advertised as compatible with disc brakes, allowing room for the brake mechanism. Any one use one of these, or have suggestions? I like the Topeak as their rack bags use their "QuickTrack" channel for easy on off of the bag. TIA.

https://www.topeak.com/global/en/products/mtb-&-700c-touring-racks/1022-master-adaptarack-(disc)
 
Im looking for a rear rack (in the USA) to use with my ST1 which did not come with a rear rack when I purchased it. Has anyone used the Topeak models that are currently available? I notice they sell a version which is advertised as compatible with disc brakes, allowing room for the brake mechanism. Any one use one of these, or have suggestions? I like the Topeak as their rack bags use their "QuickTrack" channel for easy on off of the bag. TIA.

https://www.topeak.com/global/en/products/mtb-&-700c-touring-racks/1022-master-adaptarack-(disc)

Yes, it has been done.
Lots of pictures here: https://electricbikereview.com/forums/threads/post-pics-of-your-stromer-here.322/
 
My own bike last year had the topeak rack.

Grand Tetons.JPG
 
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