I've got a 4*40 and it's a great plane (I'm also finishing up a Sig SE). I'd also suggest the 4*, and THEN get the SE. The 4*40 is a Good plane. I love mine. It's got a TT Pro 40 in it with a 10-6 zinger prop.

If you go for the 40-version, there are a couple of things you might want to watch (if you are making a kit-built plane). The kit is now laser cut (which is good). However, the notches cut in the ribs for the 3/16" wing spars seemed a little loose to me. I cut tiny pieces of 1/64" plywood and put them in the rib's spar cutout. Perfect fit. Just make sure that you get CA on both sides of the shim for a good joint.

One other area to look at is the wooden nut plates for the wing hold-down screws where they attach to the fuse. Sig gives the builder some balsa triangle stock for reinforcement. This didn't last after my first rough landing (high wind, and the plane cartwheeled). I have some small pieces of pine in there now for reinforcement. No problems.

I was a little concerned about the 3/16" wing spars, but the plane's been flying for several months now and no problems. I've been putting it through its paces.

Overall, I love the plane. Sig made another really nice design. Glad they turned it into a laser cut kit.

Just my $.02

Bob