When the Collection Gets Ahead of the System
You pull out a rig you haven't touched in three weeks. It has a coil in it — but you can't remember if it's a 0.4 ohm B Mesh or a 0.6 ohm LP2 DC MTL, and you can't remember the last time you changed it. You've been running four or five different setups depending on mood and juice, and the mental overhead of tracking which coil is in which tank, which juice pairs well with which rig, and what your coil stock levels look like has quietly exceeded what a person can maintain in their head.
This is the point where most collectors either stop varying their setups — defaulting to one or two rigs — or start burning coils past their useful life because they've lost track of the timeline.
The Three-Library Architecture
The architecture here is the design choice that makes the difference: three linked libraries rather than one flat list. The primary rig record links outward to a Vape Coil Stock library (for coil inventory) and a Vape Juice library (for e-juice profiles). Each library is its own database, but they're surfaced together through linked entry fields on the rig record.
Resistance in Ohms and Wattage are stored as decimal values on the rig record, not just coil notes. This is the exact combination that determines your firing profile, and having it per-rig rather than per-coil type means you capture the specific setup you've dialed in — not just the manufacturer's rated range. A B Mesh coil running at 0.14 ohms and 55W in one setup may fire completely differently in a different tank with different airflow. The record captures your actual tuned configuration.
Last Coil Change is a date field on the rig record. Last Swap is a datetime. The distinction matters: Last Swap tracks when you moved a juice or changed which coil stock entry is linked to this rig — a routine rotation. Last Coil Change tracks when you physically installed new coil media. Those two timelines are independent. You might swap juice three times a week without changing coils, but the coil life clock only resets when you note a change date. When you're six weeks in and wondering if that slight burnt note is the coil going or just the juice, the date field answers the question.
Wattage Range as a text field sits alongside the numeric Wattage value, because coil types like RPM2 DC MTL have an optimal window (say, 8–13W for MTL) and a maximum ceiling. The numeric field stores your current setting; the text field stores the coil's operating envelope. When you're loading a new coil type from stock, you check the range before firing.
Finding the Right Setup Before It Finds You
It's late, your tank is dry. You want a medium-density MTL draw with the fruit menthol juice you've been working through. You open the Memento rig library, filter by Coil Type for MTL options, and check Last Swap to see which rigs have been idle. The Nord Reg. MTL rig has been sitting for four days with a fresh coil. Wattage is already set to 14W. The linked Juice entry is still the citrus blend from last week.
Sixty seconds to find the right setup, confirm it's ready, and be done. That's the value of the linked entry architecture versus a flat list — the juice and coil context travels with the rig record, so you don't have to hold any of it in your head.
The Coil Stock library's reorder status field is the other half of the operational picture: when you're down to two B Mesh coils and you have three rigs that use them, the reorder flag fires before you're caught flat.