Jungle, can you explain your method a little more? Putting the dots on the wind side "proportionally", what marks are we using?

In the meantime, I read up on this and learned there is another course correction function in the E6-B (see the instruction book) on the slide rule side. First grab a beer, then put the number of miles off course (in our case 20) on the outer dial, and the distance you want to go to re-intercept under that (in our in case 70 miles). Then you find the rate arrow is, and voila- the intercept angle you need is shown there (16-17 degrees in our case). Add that to whatever heading you are presently on, and fly that to re-intercept the course. Again, this works because there is a right angle between the two courses which allows trig relations via the unit circle.

I was cruising around Kansas at night recently and wanted to use the slide rule on an E6B and did not have one with me, wanted to do a simple rate calculation as headwinds were robbing cruising range and it looked like I might be impinging on my fuel reserves. Unfortunately the only E6B I had was on my pilot watch, and my eyesight has gotten so poor up close I can't read it any more, it was too small. So I resolved to carry my old ASA E6B used for teaching. People always frown on proven tools like the E6B whiz wheel, but they are truly useful.