Conversation so far:
How many original members of Curved Air were in the new Curved Air?
Sonja Kristina and Mike Wedgwood
Were either Sonja Kristina or Mike Wedgwood the lead singer for the new curved air?
Sonja Kristina
Who played guitar for the band curved air with Sonja Kristina and Mike Wedgwood?
Kirby Gregory
What did Sonja Kristina do with the band curved air?
Sonja Kristina is the lead singer
What did Mike Wedgewood do in the band curved air with sonja kristina as the lead singer?
Mike Wedgwood played bass guitar, vocals, guitar

Question: Did the band achieve commercial success?
Self-contained rewrite: Did the band curved air  achieve commercial success with Sonja kristina as the lead singer and Mike Wedgwood playing bass guitar, vocals and guitar?