Making Custom Entries in Combat Tracker Stick

[Jingo]

I've modified the npc char sheet and the combat tracker to hold a custom text field named "toughness". When I drop the npc onto the window I can see the toughness pulled into the field of the combat tracker from the npc sheet. However if I close and reopen the Combat Tracker window, everything remains but this field is wiped out. What do I need to do to get it to "stick"?

Thanks in advance!

[Jingo]

Nevermind. I think I figured it out. There's the "store()" function in the combattracker_entry.lua. I tweaked that to accept the "toughness" entry and it seems to do the trick.