ENH:  Take into account average offset.
ENH:  Take into account average offset.

stnava/ANTs,dawnsong/ANTs,fbudin69500/ANTs,stnava/ANTs,dawnsong/ANTs,fbudin69500/ANTs,dawnsong/ANTs,dawnsong/ANTs,dawnsong/ANTs,stnava/ANTs,fbudin69500/ANTs,fbudin69500/ANTs,fbudin69500/ANTs,stnava/ANTs,stnava/ANTs,dawnsong/ANTs,fbudin69500/ANTs,stnava/ANTs,dawnsong/ANTs,fbudin69500/ANTs,stnava/ANTs