Dr’s told me I compensated extremely well due to my flexibility and that if I was to avoid issues moving forward I would need to stay flexible, loose.( seems like a fairly obvious piece of advice but this idea does not really become an issue for most until post athletic career … you hope;) Mike Forgraves who has been making my orthodics since I was University ( Mike studied under the guy who originally did my orthodics in high school) told me in his opinion it was best to narrow the difference but in a careful way and maybe increase this over time. In general terms the lift does not make both legs the same. To what degree I am not sure. My trail leg ( my right leg) happens to the longest one as well ( almost one inch) and greatest difference is in femur. I wear orthodics ( with a small lift) in all my shoes, most of the time and did also in my spikes most of the time