Thanks for the kind words, I never mean to criticize only try to give real world experience so if anyone has thought me to be critical I apologize. I have been a toolmaker for more than 48yrs, trying to retire but company keeps wanting me there so I just work a couple days a week. I am quite sure your welding skills are far greater than mine and mabey your electrical skills as well. I am known as "sparky short circuit" around the shop, I do not do welding or electrical except for my hobby use only and I won't brag about it. However when it comes to material strengths and design strengths that is my area of expertise. In regards to your tree skids or whatever you call them, I would just be a bit concerned about self threading fasteners. Yes there are some really good ones out there at a $, but many think of inexpensive easy to screw in self tapping screws such as the ones that hold the skid plates on the machine and those I would be concerned about.