The holes at the toe should be spaced closer together and successively broken from the front row.

d	44-51 mm
	1 3/4-2"
L1	30-40 cm
	1’-1’4"
L2	60-90 cm
	2’-3’
D	Add 5% of Height
	80°-90°

The front holes (up to the sixth row) may be simultaneously filled in. It is more effective for the removal to fill in 1 holes and then each two rows (2,,3) after a delay of 6-20 hours.