I have flown the 125 on and off for 25 years. TKS is old for sure but it works. As long as you have a ready supply. Africa can be a problem. Take some spare. Other than that no problem. In the sim they want you to prime, prime and prime again. Yeah in an ideal world for sure. But away down route in africa for 3 months? No way! With the climb performance of the aircraft it rarely get used in anger so no real problems. A historic solution to the problem of icing but one with no vices?