vars.scad 398 Bytes

$fn=20;

strength = 2.5;
gratesize = 16.8;
innergrateXypos = 76;
innergrateYxpos = 65;

roundborderInner = 5;
recess = 7.87;
lidrecess = 5.7;
handleWidth = 126.3;
handleHeight = 30;
handleCorner = 8;

gxXPos = 58;
gxYPos = 7;

offset = gratesize+roundborderInner;
base = recess-(roundborderInner+strength);

screwhead = 4;
nutheight = 5;
shimblockHeight = 10;
shimheight = 1.4;
shimdiameter = 12;