Tower project

I'm in beginning stages of installing a 50' guyed Glen Martin tower, 13"
per side.
http://www.glenmartin.com/catalog/page6.html
Finished digging the 45" cube hole for the concrete base yesterday.
Quite a chore with a small hand shovel, but kept thinking about the
"Little Engine that could, "I think I can, I think I can... Started out
with a larger shovel, but the small 'stricker' type was just right at
depth and what I could lift up to the wheel barrow. Soil is a dirt-clay
mix. I figure it took about 18 hours, a couple hours at a time over a
week, since I'm an old geezer.

Next step is to secure the tower base, which consists of 3 28" 3/4"
rods, secured at their top and bottom with metal braces, that will match
the tower base. I'm working on how to secure it in place while concrete
is poured. Thinking of rebar into the dirt sides and bottom corners,
tied securely to the base with wire.

Any better ideas or suggestions?

trees

Any reason I shouldn't use two old healthy 40'+ oak trees as guy
supports from about the bottom 4-5' of the trees? I have three supplied
ground 'screw in' guy anchors, but these trees are in the right place
and I couldn't screw in the ground anchors with so many big tree roots
in the vicinity. Maybe use very large and long screw eye-bolts, or
possibly drill a hole for a bolt through the 15" dia trunk?

The tower and beam will be well grounded. Does it matter if guy wires
are also grounded, or not?

House and 3rd guy

The tower will be about 3-6' from the house and I have a heavy duty
house bracket that could go into a window header 2 x 6 about 8' above
ground. I know it's not necessary, and I have no idea how secure the
header is, but I figure it'd help keep it stable, esp when several guys
would be lose while raising the hazar platform which contains the rotor
and mast while moving it and my beam up the tower and above the top guy
wire brackets. I'll be able to assemble the beam onto the mast while
standing on my 1-story house.

The tower itself, being HD aluminum and about 220 lbs, is to be walked
up by a few good men via the base's hinge plate.

Would like to hear "words of wisdom" from anyone who's worked on a
similar tower project.

TNX

Marv W5MTV