I have been working on a fully automatic smelting system with as low lag as I can get. I started with a standard super smelter system and added a bamboo farm to automatically feed the smelters with a rail cart system. The bamboo is grown using bone meal from dispensers for more efficient harvest. The pistons are timed to break the bamboo as soon as it has grown from the bone meal.
This whole system turns on and off depending on the smelting systems needs, so it won't run all the time or have to manually shut off each part of the system. All of this is done with basic Redstone components and circuits.

I am now working on beefing up the bone meal supply of the system. I have a sugarcane farm that supplies the materials to turn into bone meal. I eventually want to have a bone meal system that will keep up with heavy use of the system. Thanks for any input and interest in my projects.

Thanks from the IronHandyMan