i really think it varied. i personally dont like how it looks with upper patt tapes on lower patt fabric. so i will put upper w upper and lower w lower unless the tapes were solid on the craft i'm modelling until i see decisive proof it was so. to me it doesnt make sense anyway. from what ive read upper pattern was always more scarce because it was used alot more. tops and sides as opp to just undersides. to the point where some planes like the halberstadt clii was seen sometimes with lower pattern on top and plain linen underneath,just because there was more lower patt around. so why would someone cut upper pattern into strips for lower tapes. i'm not saying it didnt happen because i truly believe it varied late war supplies were getting thin for the kaiser so whatever was on hand did the job.