recompose this grid

testing results for: monetdb5
mac-mini
Cla-Dar-i64
monetdb5/extras/rapi300.998 
rapi01 X X60.027 
rapi02 X X60.025 
rapi03 X X60.020 
rapi04 X X60.020 
rapi05 X X60.017 
total301.849 
70375 (Nov2019)