Note: groups.io will be down for maintenance on Monday, September 26th, starting at 9AM Pacific Time (4PM Monday September 26, 2022 UTC), for approximately one hour.
Re: Intro and IDC connector question
IDC connectors should not be reused as they are designed for one time connections.
You might consider these Wago connectors. The flip lever clamp is easy to manipulate and can be opened and closed a lot of times without degradation. They are also rated for a very wide range of wire sizes in the same slot. This is not at all true for IDC. The downside is that you have to cut and strip wires.