The TT on Merckx MXL Leader frames is in fact ovalised, but it‘s a minimax tube with smaller diameter and the ovalisation is the other way around compared with the usual max position.
Seatstays on MXL frames are SLX. With the differend oriantation and Diameters, they redesigned the lugs as well. Before the MXL, they offered a „full“ Max Version of the Corsa Extra with the normal Max TT and ovalised Max seatstays.
The TT on Merckx MXL Leader frames is in fact ovalised, but it‘s a minimax tube with smaller diameter and the ovalisation is the other way around compared with the usual max position.
Seatstays on MXL frames are SLX. With the differend oriantation and Diameters, they redesigned the lugs as well. Before the MXL, they offered a „full“ Max Version of the Corsa Extra with the normal Max TT and ovalised Max seatstays.