With this machine you can cut trees to different sizes. You can show ruler which help you to find correct size of cut. 
It can be used for loading logs on trailer as well. It is knuckleboom loader type. It allows you to load whole trailer with long tree logs from behind the trailer eg.
1. Unfold the trailer
2. Grab sawbuck and place it on the ground
3. Open sawbuck

Price:  295000 $
Power:  280 HP
Max. reach: 10 m

Default controls:
Crane arm - same as ingame machines
Saw - AXIS_CRANE_ARM4
Open / close sawbuck - action for Open Cover (default KEY_N or KEY_Y)
Show / hide ruler - AXIS_CRANE_TOOL3

If you find any errors or issues, let me know in comment or to [email protected] and i will fix it in next version.