Welcome to The Grumble, Steve.
Sometimes this forum is less responsive on the weekend, so I'll get this started and everyone else can chime in and tell me I'm full of it.
Attaching a stretched canvas to a linen liner is exactly like attaching it to any frame with a rabbet that is too shallow to accommodate it.
For a decent canvas, you might want to use commercial or home-made offset clips that screw into the liner and hold the canvas without any hardware piercing the stretchers or canvas.
For decorative canvases, I have been known to use the Fletcher fitting tool with the fasteners that have a hole - the Multi master?? - and put short screws through the hole into the stretcher. This is hardly a conservation technique, since you're piercing the canvas and the stretcher bars with the points, but it makes the whole assembly easy to remove from the frame, if necessary and, in my opinion, doesn't damage the canvas much more than the staples that are usually used to stretch it in the first place.