Today I started thinking about maybe putting up a 2-element SteppIR beam
rather than the 3-element tribander I was considering earlier... main
reason for this is the need to be able to operate on MARS frequencies that
are a ways outside the 20-meter band, too far outside to use normal
triband beams.

I'm wondering if the 2-element SteppIR (30 lbs weight, 4 sq. ft. area)
with a Mam-II or Tailtwister rotor (turns out I have both) will be
suitable for my 50-foot Rohn 25G.

The tower is currently guyed at 30 feet with heavy-duty stranded steel guy
wire (the real stuff, not that flimsy stuff Radio Shack sells) and I'm
planning to add another set of guys at the top perhaps using that
Phillystran (gotta look that stuff up and learn more about it...).

Do any of you have experience with the 2-element SteppIR and if so, how do
you like it?

It seems to me that the boom is mighty short at only 57 inches (1.44
meters). That spaces the elements less than 1/10 wl apart at 14.2 MHz
(actually only about 0.07 wl) which seems way too close to me.