Wow i love this! Looks very realistic, i would have plugged the holes on the round 4x4s with 1x1 brown rounds as it would look like the old branches had broke off as they do in reality. Probably a bit late now though and that aside its a beautiful tree. I have a lot of those palm leaves from my childhood pirate sets, but not 140 like you maybe i'll try a smaller tree.
Maybe you should rather have made it octagonal, because those holes look kind of weird. Additional even smaller leaves on top would be perfect, although I wouldn't know if there is a fitting piece. Maybe brickbuilt? Anyways, can't wait to see it on Sneľnik!