Thanks for putting time into this plugin, I just wanted to let you know that I seem to be having issues. 2.0 kept erroring on load but was too busy to come post, 2.0.1 seems to load and can now enable and disable however I can only build twig, I still need resources to upgrade. 

Also the new update for deployables to be free sounds great but I am not sure how this is to work? I cant craft any deployables without resources so I feel like I may be missing something?

I am trying to make my combat server a bit easier for my mods and arena creators with this plugin.  again, thanks for your support.

WhiteThunder explains why the upgrading is not free in this thread I would recommend taking a look, essentially the upgrade UI is client side so the client needs to think it has the resources in order to display the option.

As for the deployables, the free deployables option does not make crafting the deployables free it just makes placing them free.

Thanks for the update and link to the conversation.  I hope that information on its requirements to use successfully could get added to the plugin page description on how to use, I am sure that reduce the possiblty of others being as confused as I was at first. haha 

Thanks again!