The only thing that I can think of why it might not work as you expect is if you want/need different conditions for the second plugin to be able to show the model. In other words, the second plugin has extra checks before it will allow setting the pumpkin model.
In my opinion, the second plugin shouldn't have any checks in it. You should be able to do this by modifying the second plugin to remove line 112 which is:
Code:
if( is_day() && get_running_day_pumpkin() || is_lr_active() && is_user_lr( client ) )
See if that helps at all.
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