Ondo was like Rocky Blanchard contacted by JF Ifonge and Savanet Depitcho to join AGB. Both guys recruited musicians for them in Kinshasa, but JF and Depitcho already disbanded before arriving in Kinshasa. Not long after that they were contacted by Koffi to rejoin Quartier Latin. In the same period Christian na Nzenze, who joined Quartier Latin along with Ramazani, as Koffi contacted them with Pompom Miyake to join (only Pompom refusing the offer).
Except from Bercy, Koffi did all concerts of that tour wiithout a keyboard player. Phillipe Guez never performed with Koffi on stage, they only collaborated with Koffi for studio-session. Guez just added some keyboards on the cd-version of Bercy, since that Koffi wasn't satisfied with the end result of the audio-version
Starting solo-artists don't have the money to buy instruments, they always rent. I don't if it had changed. But back in the 2000s, you had even established artists that were still renting instruments. Financement is very important for a solo-career, otherwise it will be difficult to make it, since that you have to rent instruments, rent the rehearse-place, pay the travel allowanceof your musicians and dancers, tv-channels to promote your album and events around Kinshasa through spokemen. The sponsorship that different artists had with Bralima (Primus) and Bracongo (Skol) during the 2000s saved many artists, since that the musical-landscape had changed since the early 2000s and the purchase power of the population only going backwards with the days. One of the reasons that Ferre decided to join Quartier Latin was because he couldn't handle it financially and Bralima at the same time rejecting him. Felix Wazekwa once said that it would have been difficult for him, if Bralima had decided to cut the contract with him, after the incident with journalist Djo K. in 2007. I believe that Soleil Wanga in an interview he did with Popol Mukelenge just before the release of his first album, that he had to give shout-outs to donors from Angola and Brazzaville otherwise it would hav been very difficult for him financially.
The music-market is dead, today most artists produce themselves with help from the money they get from donors. Already from 2003, it started to become hard to find good producers since that Sonodisc/Next Music and JPS Production closed. Recording albums isn't easy there are different artists that had recorded solo-album with their finds, but couldn't find a producer with the album never getting released. Sweet Elesse of Victoria Eleison for example recorded an album back in 2007 before settling in Angola , but it never came out.