Stopped by the machine shop today, and picked up the start of my next tracker mount for the next array of panels going up. This one is going to be 10 245w Solarworld panels on a dual axis mount this time ( previous two are single axis, east/west trackers ). The other axis will tilt the entire array on the horizon angle to compensate for the sun angle from summer high point to winter low point. Hope to pick up another 8-10% more watts that way. Don't plan to power it on a daily basis, I figure to make is a manual crank thing where I adjust it once a month or once a quarter. Making the whole mount/pole "beefier" this time too. Last one, I used a 6" sch 40 steel pipe, this one will be 8". Putting 10 panels that are 18sqft each on it, so that's 180+ sqft feet of "sail" area up there for the wind to hit....beefier can't hurt. This one will also be higher in the air....last time, I had a 20' pc of pipe cut off in half, and put it 3' in concrete ( 4'x4'x3'deep ),leaving about 7' out of the concrete. This one was a 16' pc of pipe I found at the scrapyard, so I'm using the whole thing, making the top of the pole about 12-13'. At one end of the pipe, what will be the top of the pole, I had the machine shop mount a 2" flange type bearing on each side, with a 2" steel shaft running thru the pipe and bearings, sticking out about 3" outboard of the bearings. To that, I plan to weld up a rectangular shaped "box" of 3" square tubing ( depending on what I can scrounge) that will measure the same width as the shaft is long, and about 5' in length. This will be welded at the mid point to the 2" shaft coming out of the pipe. Once the pipe is set vertically, the shaft will be horizontal, and this "box" will be oriented north/south. This is the horizon tilt for the array. Then, on top that box frame, I'll mount a couple of 2" pillow block type bearings, same as the other arrays, and weld up a frame to it that will be the east/west tilt. This will all make a whole lot more sense with the pictures that will follow.......but basically, picture a kid's that not only goes up and down on the seat ends ( that's one axis ), but also tilts left/right at the center point....from about 20 degrees for the summer low, to about 55 degrees for the winter high angle. ( which is the other axis ). Pics to follow over the course of the next month or two, as I have time and funds to work on it.