Hello Ehud,
have you tried defining "Directive[Thick]" as a shorter variable in the beginning, and then using that variable in each place? Might save you some typing.
For example, somewhere above your plot command, just write:
dT=Directive[Thick];
and then, instead of typing "Directive[Thick]" each time, you just type "dT" ?
Didn't try it, but should work. (?)
Greetings,
Oliver
