Tiered recipes

Tier 1
[Red Stone Plastic Sheet Red Stone]
[Plastic Sheet PCB Plastic Sheet ]
[Red Stone Plastic Sheet Red Stone]

Tier 2
[BP Plastic Sheet BP]
[Plastic Sheet  Tier 1 Plastic Sheet]
[PCB BP PCB]

Tier 3
[AP Plastic Sheet AP]
[PCB Tier 2 PCB]
[BP AP BP]

Applied Energistics
Tier 1
ME Drive
Access Terminal
ME Chest
ME Interface