A complex which stabilizes the binding of and correctly positions the outer dynein arm complex along an A-tubule of the flagellar axoneme outer doublet microtubules. [ GOC:krc http://www.ncbi.nlm.nih.gov/pubmed/25192045 http://www.ncbi.nlm.nih.gov/pubmed/15064350 http://www.ncbi.nlm.nih.gov/pubmed/24067530 http://www.ncbi.nlm.nih.gov/pubmed/27486780 http://www.ncbi.nlm.nih.gov/pubmed/8045937 ]