Namely, do they stack?
If, for example, you've got an EXTEND weapon (Scythe, ferex) and you slap on a long haft addon, does it further increase the range?
What about BURN (Fire token on a sparkling lawn dart, mayhap) flags and junk -- does having two on the weapon increase the effect? Etc, so forth, so on. EXTEND would be pretty easy to check, but the rest... maybe not so much.
