2 tbsp. MSG, this is non essential to making good tasting beef jerky. Since you are not using any nitrates and it is easy and quick to produce, then why screw it up with unwanted ingredients! The Mountain Men didn't have when they made their Beef Jerky!

A few tablespoons of liquid smoke are plenty. Also, unless you use convection, you're looking at more like 5-6 hours. The soy and W sauce above are a good starting point, but you can add other flavorings as well -- concentrated cherry or pomegranate juice is wonderful, or herbs, sugar, or garlic and chillies. Allow to cool before storing in an air tight contained -- otherwise condensation may form, which will drastically reduce the amount of time you can keep the jerky.

@Richard: the mountain men didn't have soy sauce, Worcestershire sauce, seasoned salt, smoke flavor or pepper in most cases either so how bout you make your bland "Mountain Man" jerky and not impose your opinion (wrong opinion BTW) on everyone else! Thanks!