This is a hint to you and to all good people who contribute making tabs and never tried the following. Songs that are hard I normally slow down to tab them out. You can do it using any sound editing software out there. It helps a lot. I usually use Native Instrument Guitar Rig's Tapedeck for slowing songs down.alexis too fast for me to tab out
You can also also transpose song to different tuning similar way by changing pitch (I also use guitar rig for that) - so that you don't have to buy 5 guitars to be able to play 5 different tunings.
Hope i am being useful.