recompose this grid

testing results for: sql
lab04
Int-Fed-i64
sql/test/wlcr29.752 
wlr20 X X1.293 
wlr30 X X1.056 
wlr40 X O0.695 
wlr50 X O0.695 
wlr70 X O4.818 
wlr100 X O5.617 
72356 (linear-hashing)