Parabellum, you're confusing JulieFlyGal much more then he/she already was. If you read carefully the post, Mno is never mentioned, because in this situation Mno is not involved at all.
Vimd is a KIAS speed (all V-labeled speed are IAS/CAS/RAS/EAS).
For a lighter weight the Vimd is different, because the total drag curve is different (less weight, same parasite drag but different induced drag, the curve goes slightly to the left and Vimd a bit lower) and so Max range speed is also lower.AOA constant.
FB