Teleskop Express have posted a video on YouTube that might help explain some of the settings. Although they don't use INDI they still mention the equivalent settings from the native driver
www.youtube.com/watch?v=xg_AoeYBvSo
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I've also got the problem with offset being 31 max but I haven't tried gain adjustment yet
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Hi Ed
Might suggest that the tags appear in a list builder dialog of some form so the user can see what tags they have added, and it can give the option to order the tags as well. This example isn't very representative of KStars, but I think you get the idea
Best regards, Tony