recompose this grid

testing results for: monetdb5
mac-mini
Cla-Dar-i64
monetdb5/extras/rapi301.000 
rapi01 X X60.020 
rapi02 X X60.018 
rapi03 X X60.025 
rapi04 X X60.020 
rapi05 X X60.015 
total301.868 
70376 (default)