usually for at least 4 hours right? I use red wine, a little balsamic and shoyu

For best results, yeah. I like this mix as well. Use a little bit of oil, soy sauce, red wine vinegar, lemon juice, Worcestershire, Dijon, garlic and black pepper. Sometimes I'll toss in fresh herbs if I have them too.

Yep this would be my plan too. Marinade over night minimum and cook over charcoal