NCPat, white pine and tulip poplar both make excellent split/dowelled shafts. the tulip poplar shoots are not very good, but split poplar wood makes great shafts. You don't need a doweling jig, you can hand-plane them easily with a small thumb plane that you can get at Lowe's for about $6. I even plane down most of my shoot shafts to adjust diameter and spine. Here is a matched set of shoot shafts from a dozen different species: sourwood, silky dogwood, arrowwood viburnum, witherod viburnum, sweet shrub, buffalo nut, chinese privet, bush honeysuckle, hazelnut, salt cedar, multiflora rose, and white ash.