I don't know that the pickup location as a percentage of scale length remains the same across the five strings (probably does), but using measurements of the G string side (34" scale), comparing it to the distance between frets, and comparing that to my J basses,
-the Combustion bridge pickup is about in the same place as the 70s spacing J
-the D-Roc's bridge pickup is a little farther from the bridge than the 60s spacing J
-the Combustion bridge pickup is about in the same place as the 70s spacing J
-the D-Roc's bridge pickup is a little farther from the bridge than the 60s spacing J
