Where should I go to ask expert modpack makers for help?

I made a pack recently for friends to enjoy on a server. I haven't done it right, clearly, as it crashes intermittently. I want to show a couple crash reports to someone who might be willing to shoot me some ideas. I don't want to give up because my friends already have builds they have started. Where in the modded community could I approach people for this kind of advice?

Thanks in advance!