Just for the record, this site is crowd-sourced. In case anyone doesn't understand what that means - that means the membership helps out with adding checkl;ists, missing cards, adding images of cards, and fixing errors. There is no one person or "other" group of people who do this. It's everyone's responsibility. Including those requesting such additions.
If you wish to help and don't have the level of access that's required to append checklists or add new insert sets, that's another story. You can assist those who can do these things by submitting Inaccuracy Reports (IRs) for the sets and provide in the request either the actual checklist itself rigfht in it (Additional Comments section) or provide a link to a site that has the checklist (or both).
Please, help us help you.
-- Dan --
Note: Please see my profile for more info regarding trading (section updated 3/4/2024). I have added a large portion of my inventory to the site, and currently have trading turned on (details are in my profile).