Didier Masela was a good bassist, if you followed the interview then you hear Christian saying that Masela thought him how to play Wenge's style, because Christian not being a good bass-player at that time (more knowing Reggae and gospel music). They needed a back-up bassist because Didier Masela was a student at the university and hadn't time to participate on rehearshals. From 1994, they started to bring Christian to Europe. They were fearing that he would also join Wenge El Paris, since that they already lost Dello Bass to El Paris in 1992, who was fed up to a back-up bassplayer and staying behind during tours. You will notice that his brother Alain Mwepu also ended up by joining El Paris.