Sorry, I didn't see this post till now. Regarding the glider plan on my website:
https://georgesrockets.com/GRP/CONTEST/BRB_contest/GliderPlan/Half-A_BoostGlider.html
The broken link goes back to when I had my website on "homepage.mac", then "overnight" Apple killed homepage for "the cloud" and I was left scrambling for awhile.
Later I got a real host, thanks to Tony Reynolds, and named my site GeorgesRockets, but didn't change that old hard link to the plans.
So, here is a link to the canard glider PDF plan that works:
https://georgesrockets.com/GRP/CONTEST/BRB_contest/GliderPlan/GliderPlan.pdf
and Jpegs from the PDF below.
This was made up mostly as a design for a "club kit model" that could be used in 1/2A Boost Glide at some NAR contests. I made up a limited number of kits, sold to club members at cost (or less).
Not a top-level glider, but certainly easy to build and reasonably reliable. A big feature of the kit was the use of the cast "L" hooks for the pop-pod and glider to attach. I have not made those cast L Hooks for awhile but might start making them up again.
There are a few other glider plans on my website, though the above glider is the only canard.
https://georgesrockets.com/GRP/CONTEST/ContestPlans.htm
Also, this sport Concorde model plan from 1980 (using a Sky Dart type internal pod) that some others have "cloned", published in the July 1980 issue of the Model Rocketeer:
https://georgesrockets.com/GRP/Plans/Sport/Concorde.htm
BTW - I've built a few Delta Katts, at least two in the early 70's as MPC kits. Sometime in the early to mid 1990's. I made a D12 powered 250% scale-up, and flew it at a launch in Phoenix, Arizona, where designer G. Harry Stine saw it fly (Man I wish I had gotten a pic of him with the model).
Also built at least a couple of "Valkyries". The first one from the plans in Model Rocketry Magazine. Then later, 1977 or so, a larger one using an AVI "E11.8" engine, as a rocket glider. To try to make it boost straight without looping, the canard slid to the rear for boost, and was flat. When ejection burned the thread, a rubber band pulled the canard to slide forward and a pitch control surface deflected "down" to pull the nose up. However on its one and only flight, while it was boosting straight, the outer half of the right wing shredded off on boost, and while the canard did deploy, the rest of the glider spiral dived into the ground. Of the big E power or above Valkyries I saw (or read of) Bruce Blackistone try at NARAMs, every one of them had a disaster of some sort. Although it was mostly lack of good engine choices, like an F10 that shredded one, three clustered D12's that shredded one, and one staged with a D20 booster motor (got off to a nice start), then ignited an F7 motor that did not have a lot of thrust for that model and its 8 second burn time resulted in the model slowly arcing horizontal and then down crashing before burnout. He may also have done one with an Enerjet F67, which was begging for a shred. Just were not good engine choices for the size of glider he was attempting, built as it was. The old Aerotech "F15" motor would have been pretty good for those F size models he tried.