If you miss viewing some of the old posts on hip pocket Aeronautics, you might be able to find it on the WAYBACKMACHINE or(web.archive.org).
Follow this link to find some of the older Post on catapult launched gliders.
https://web.archive.org/web/20200806102708/https://www.hippocketaeronautics.com/hpa_forum/index.php?topic=3985.0Click on Hip Pocket Builders Form, under the home help search login register; bar to get to the main page of Hip Pocket Aeronautics.
You can use the very top bar to select times of the year's that the way back machine has archive Hip Pocket Aeronautics Builders' Form to see if what you are looking has been archived.
Here is the main page at web.archive.org
https://web.archive.org/web/20230000000000*/https://www.hippocketaeronautics.com
This link doesn't work unless you copy and paste it into a new browser.
I'm sorry if you spend way more time looking through this like I have. :-)
Bob