Using a 14"+ long ladder on a 6ft long log becomes a bit tedious.
Using a narrow guide board for a wide log also leads to twists in the cut.
This is why I went for a two part set of log rails made from Unistrut.
I bought two 20ft lengths of Unistrut and cut these into 4 10 ft lengths and bolt these together at various widths and lengths using all thread rod.
Photos etc are in this post
http://www.arboristsite.com/communi...101-hints-tips-and-tricks.93458/#post-1454512 there are also some examples of others in the Milling 101 sticky.
Yes they are heavy - I would not want to be lugging these too far though the bush.
I also use them on nearly every cut.
1) All the undersides of my mill rails are lined with HDPE so they glide easily over the log rails, much less friction than with a rough milled surface
2) The guide rails can be adjusted up and down to remove twist from a previous cut.
3) The log rails lifts the mill above the previous cut - this means I can place wedges and a hammer down on the cut surface before I start the cut - then as I go along with the nest cut I don't stop cutting to put in wedges.
4) The log rails provide a good place to perch the mill on at the start of the cut to start the saw and at the other end to allow it to cool down.