[neil]

I have really had a big problem this year hitting a push.

I have written about this before and thought it was a clubface issue and after ruling that out thought i was swinging too far right.Well i've kind of ruled that out too.This happens with all the clubs but magnifies with the longer clubs that go short and right.

Now getting close to desperation, i'm thinking that my lower body is overactive.

Any ideas or insight as i'm really at my wits end.

Are you SURE you are tracing a straight plane line?
I have had similar issues ,my causes were
1.Re -gripping with the left hand somewhere between the top and impact -I had it so tight I couldn't horizontal hinge.
2.I WAS OFF PLANE -OR AT LEAST BENDING THE PLANE -on the way down,focusing on a good finish /follow through-ON PLANE was the cure.

I would also suggest you might not be hingeing properly-and 2 above could be the cause hitting balls with a driver -feet close together, may reveal this.
keep at it,I have shared your desperation ,thing is, sometimes the answer is as simple as reading a book -and looking at pictures!
Good Luck!