[mactec54]

you can go with a g53 or just return home g30 , nothing goofy about it if a tool change may be needed . it doesn't necessarily have to been in the header but it doesn't hurt anything either
G64 is toolpath control the p value is a tolerance , I punch g64p.001 into all my headers . I've had pathpilot do some funky stuff without the tolerance added

Neither a G53 or a G30 is required at the start of any program

You don't need a G30 because you are going to do a Tool Change, as soon as a Tool is called T26 in his case the Z axis will move to the tool change position