If that's as far as your thought process goes you better stop wile your ahead. Grade 3 would have more then sufficed for this application as well as a standard 10-32 machine screw. I can understand your thought process, but it is flawed. A weak foundation the house will fall. But I digress, my comment was aimed at trooper and his overly wishful thinking of sunshine, unicorns and rainbows.You seem to understand that your efforts are more or less going wasted, but you have decided to persevere anyway. I'm not a blow smoke up your arse type of guy, and truthfully if someone want to, they can blow it through the pm system. I do believe you have the potential to make something decent once you understand starting with a subpar platform and Transgendering it into something it is not was a waste. Now let's see it run. Nothing on that thing is going to die because of a bit of snow.