Look again at the two pictures I posted of a large cedar tree being carried by the Kubota.
Sometimes it the tree is leaning toward you when you pull it you have to adjust your bite or roll the puller forward to get it balanced away from you.
My Brother's shear had a second clamp that held the trunk about 3ft above the shear. Necessary to control sheared tree because you don't have a firm grip on it. I wouldn't want something like that on a puller. Too slow releasing the tree if something goes bad, like a sideways tip.
As for building one, there's very little that is technical about cutting the pieces. The last thing I did was make the toothed jaw plates. I did that by turning the puller upside down, closing the jaws until parallel, then welded a plate of 3/4" to the bottom of my jaws spanning the gap between them. Then using a cutting torch I cut the teeth by a simple S shaped cut between the jaws.
You'll have to source some solid rod and bushing stock to make the swivels. you can buy that stuff already built or buy the pieces and make it. I had the pins and bushings onhand so that's how I did it. I used 2 short pins. If buying materials I'd suggest one long pin and bushing.
The SSQA part is very easy. Once you get started it would make sense to you.
If you decide to tackle the project start a thread. You'll get a lot of good advice and suggestions about how to build it. Then you just look for the suggestions that match your capability. I've been given some very valuable technical fabrication advice on TBN. Sadly the ones I like best are above my ability to duplicate.
