Looks good. I have been surprised by the size of tree I can remove from the ground. If you haven't already had this happen, you need to be careful of a few things. Your puller does not have a top "push bar" that extends up a few feet and angles out. As you get more and more comfortable you may begin taking larger trees. My STP-25 didn't have one and I started pulling things 20' high. If it gets loose or pivots it is coming at you. I ended up with a face full of tree one day. If you find you are rocking a tree back and forth that doesn't want to come up, if you go in reverse TOO hard you'll do an endo on the front wheels. I see you have
ballast which is good (as do I) but I still have done it and it never gets less sketchy. My grill is also still not protected and I did have a pin-oak limb come right through the plastic and luckily miss the radiator. Your tractor will push into things, but it can go through the grill and into the vitals.
I love the comparison of the twig vs. bush
. It is a versatile tool.