In my previous post, I discussed how I play ballad stride piano.  The information I gave and the examples I cited, refer to occasions where a chord is held for an entire measure.  However, many, if not most tunes regularly use two chords per measure. And in lots of cases, where one chord is printed per measure, you can create a second chord that precedes the printed chord.  Therefore, in most cases, you can simple play the root of the chord as a single bass note on beats 1 and 3 and play the rootless chord on beats 2 and 4.  Therefore, in many cases, you don't have to think nor apply that "outside"/inside" device at all. 

  I just wanted to clear that up. 

  Here's an example in Eflat:  In the tune, "Blue Moon", on beat 1, play bass note Eb, then  on beat 2, in ascending order, D-F-G-Bb(7-9-3-5)  on beat 3 play bass note "C" and on beat 4, in ascending order, Bb-D-Eb-G.  The progression continues with Fm7 and Bb7.  Apply the same pattern.    

  Note:  You still have the option of using the 3-5-7-9 structure, as well.