Editing Openai/68fceef0-7248-8013-bf5d-581461dec5bc (section)

=== Assistant: Summary of new instructions clean and exact: ===
Summary of new instructions (clean and exact):
# Arm length fixed/default - Both arms are always the same length - Default = 24 inches (user can change within 12–48" range)
# Pulley routing logic - Top unit line path: Vertical → top pulley → top pinion intake drum - Bottom unit line path: From top pinion output drum → down to bottom pinion intake drum → through bottom pulley → to primary weight
# Pinion-to-pinion spacing - Fixed, always 4 inches center-to-center
# Two weights - Primary weight = weight at the bottom line - Secondary weight = weight attached to the top line (after top pulley) - Both user-input in pounds (imperial only) - Rule: Secondary < Primary (secondary can never equal or exceed primary)
# Don’t model extra pulleys used only for clearance on the top - They exist but are ignored mathematically

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