Took a look at the blog and have seen this tuner talked about alot here. Do I understand this right, the tuner must stay plugged in after doing a flash or tune change from stock ecm? I have a 2018 rm all stock still need to get the recall done for the neutral switch.Yes, it is worth adding on stock bikes and yes you can tweak the tune yourself. In fact I encourage it and have written a blog to help folks.
My Indian Roadmaster Blog shows the index to the tune related posts.
This link points to a PDF document describing how to change the Drive By Wire tables. On 2019 and later, you just have more tables to contend with.