How to Configure Applied Energistics To Increase Item Count to an Exact Value When Smelting?

Normally for my AE setups where items are required to be smelted (Rubber / Plastic) I like to create a buffer of items, so I have an exporter setup with a level emitter and an oven the says, if the amount of plastic is lower than X in the network, export rubber into the oven.

What normally happens is I end up with around 64 more than I want since they are all in the oven when the level emitter finally fires. This works fine until the items are very expensive (Advanced Processor). I don't want to use 64 more diamonds than I need.

How do I configure my network to always have 10 items in my buffer, and if it is less than 10, make the exact amount needed, accounting for the delay and internal buffer of the oven?

-- I'm currently doing this in Agrarian Skies.