While the kit system is designed primarily for just-in-time (JIT) kit assembly during picking and fulfillment, there are ways to manage tracking preconfigured kits in SKULabs as well.
When deciding how to manage preconfigured kits, consider what you are looking to achieve:
Tracking on-hand stock of both preconfigured kits and the individual (unbundled) component items used for JIT kit assembly. How many preconfigured kits do you have? How many JIT kits could you make based on the available component-items stock?
Preventing overselling and needing to "break" apart preconfigured kits to fulfill individual item orders or other JIT kits that share component-items with the preconfigured kit.
Having a straightforward link between a listing and preconfigured kit
Simple picking and deduction
The cleanest and simplest recommendation is to treat preconfigured kits as distinct individual items:
Simply create an item SKU that represents the preconfigured kit.
When building preconfigured kits, increment the stock of the item SKU which now represents the preconfigured kit and decrement the stock of the component-items that were used to create it.
Create a separate listing on the channel and then import and link it to the item SKU which represents the preconfigured kit. This uses two listings, one representing each fulfillment version of the kit.
What if you don't want to have more than one listing for a kit? While this is possible, it is not recommended because it comes with tradeoffs such as under-advertising stock, overselling stock or introduces fulfillment complexities.