Increase vk20 track tonnage

Reported by: leha44581

Description

For the same track length, A13 and VK20 get basically the same tonnage The VK20 gets 7.5 tons, the A13 gets 7 tons VK20 is 1.9t, A13 is 1.55t, so even the marginal gain you get from vk20 is eaten largely by the track itself VK20 is 52 LC, A13 is 46LC