Weak semi-circular mark in bottom left corner

a

Mark above slot on left ridge

a

No marks above slot on right edge

a

Excess plastic on right hand side of brick

c

Without line on right side of brick near bottom

Mark on right side of bottom slot only

a

Marks on both sides of bottom slot

Weak mark near top right corner of slot

a

Large mark next to slot

No excess plastic on top side of brick

No excess plastic on bottom side of brick

a

Excess plastic on bottom side of brick

Hole at stud 1

a