From: Queensland, Australia.
There is no simple explanation guys. In the early days we had unlimited HQBU, muling and a much more liberal Air Supply function. So deep penetrations back then were relatively easy to maintain. The game has now reined in HQBU, muling and Air Supply so its very difficult to do now. The latest patch put a range limit on the distance an AB can be from a railhead and still do air supply. This was a real blow to what I and others could do previously. So every game started since 1.06.27 is new territory as far as the Axis 1941 summer is concerned. Forget about all those games you saw previously or started before 1.06.27, you can no longer replicate those results in the current game state. Period.
However if you are very focused on your logistical network you can devise a system that will allow some deep moves if your opponent has a weakness in his lines. There is no single rule to follow. Each situation requires its own solution. Only study, practice and game experience will give you the tools to develop the right plan. But there is enough 'juice' left in the system to get a single Pz Group deep in to Russia, if your opponent leaves a door open for you.
I could put forward several examples but I am reticent because you will always get a section who will say its gamey, abusive etc etc and should be rubbed out. Sorry, but there is so little left in the game now for Germany in 1941 that I dare not risk what is left. Anyone who has read my posts will know that I have exposed at least two major logistical loopholes that I considered legitimate and obvious bugs. So I am not talking about that kind of thing.
I am talking about a lot of little things here and there that together add up to the whole being greater than the sum of its parts.
'Deus le Volt!'