My progress can be (I think, most likely) related to being familiar with the highracer stance. I basically have the handlebars and seat angle almost exactly like I do with my Meta Bike.
I can still remember my first 2-wheeled bent highracer (Corsa 650) and the learning curve. Comparing the two, at this point in hours and miles, I’m feeling more in control and much more confident with the Silvio than I did with the Corsa. With the Corsa it was right around 400-500 miles that I was able to ride a straight line and not drift.