Tool Wear offset

i need to change the tool offset data thru g code while my program is running
currently this works i have wear var in the head of my program that i just add the number of parts i have ran and i have a preset var to adjust z down
however i would like to change the tool offset

#5 = -.1102 ([#5 z depth] )
#6 = .11 ([#6 z return])

o200 sub
G90 Y-[#7/2]
o210 IF [#3 LE 0]
G91 X-[#12] A[#13/2]
Z #5
G1 A -#13 Y#7
G0 Z #6
A[#13/2]
o210 ELSE


however i would like to change the tool offset
the g43.1 works but its not permanent
i need it to be a permanent change to the tool table
lets say i use a M300 for the example
#5 = -.0002 ([#5 z wear] )
#6 = .11 ([#6 z depth])

o200 sub
G90 Y-[#7/2]
o210 IF [#3 LE 0]
G91 X-[#12] A[#13/2]
M300 [H10 -#5] (CHANGE TOOL LENGTH OFFSET BY VALUE DEFINED IN #5)
Z -#6
G1 A -#13 Y#7
G0 Z #6
A[#13/2]
o210 ELSE