CCY, I assume when you mentioned TBS, you mean the Terminal Bersepadu Selatan which is located at Bandar Tasik Selatan where the KLIA Monorail, the KTM and all the buses and taxis serving nationwide destinations meet. I would call the TBS the mother of transportation hub. Well, to go there just simply hop onto the LRT at Taipan and it will bring you there. With effective from tomorrow if all their transition plan are executed well tonite, you just sit on your fat ass on the same seat. But there is a slight problem. If you see the approaching coach is a 2 coach configuration, it will terminate its journey at Putra Heights since this dinosaur coach is the older generation one. Only the 6 coach configuration will seamlessly take you all the way there. I presume those sitting in the 2 coach system will be advised to switch coach at Putra Heights should they want to go to TBS and onwards. So this all will happen depending on how they transit tonight.
May be next week, I want to be adventurous. I will try the Ampang line to see that part of KL I seldom get to see.