By DOLORES HOPE Staff WriterAs family ties go, theirs is a flimsy one But they like it, and they're hanging on to it.In the 1930s. Lena Wood of Seattle and Homer Bud” Brinton of St. Joseph. Mo., were brother and sister, by adoption, for a short time after their births in Garden City. When their adoptive parents divorced, they were adopted again but not to the same family They were separated for 46 years.Since 1981, when they found one another, the old tie has been strengthened Last week, a trip to Garden Citv and Lakin with theirwspouses provided an “on site” refresher of the dim memories of the past and of their times together and apart.