Corsair sent me replacement parts super fast and I was able to replace the gas lift canisters on my two T1 (2018) gaming chairs. The first one was really stuck but with a rubber hammer I got it loose.
I see the I'm not the only one scratching the floor with a T1 race gaming chair. I just submitted my ticket. I really hope CORSAIR can help me. At least with my gaming chair since I'll have to spend some money to fix my wooden floor.