Kieth,
The technical stuff has been covered, the only advice left to give is to leave some of those stems longer than 21'
You should be able to bring in a bandmill guy for a day or so or hire a knuckleboom to truck a few to a mill with a long carriage,for reasonable money and end up with continuous ties & plates and a better frame.
Also, drop them before the sap really gets to risein !
Should read : Band mill guy with a longer mill - Woodmizer folk for instance sometimes own the available 20' extension will set it up for an additional fee, and you end up with timber in the 35' range
Will
[This message has been edited by Will Truax (edited 03-02-2001).]