What is the point of having a lightweight mobile saw when it is eventually towed by a heavy tractor or a truck? Our SL and SE models are in the same size class in terms of their maximum log dimensions, but they are optimised for transport by regular vehicles with a towing capacity of 3.5 tonnes. Not so with the XT: The weight is not a consideration in this case, and in terms of design this unit is based on the heavy stationary XE models with an extremely robust build.