I'm about to use Studio's new 340-125 floater on a large canvas the same thickness as the floater. I've got a few ideas on how to attach it ... but I'd like to hear those of anyone else who has used this frame...
Three screws or more along each of the four sides is traditional if the canvas is stretched on bars.
I don't know about "invasive", but screwing into, stapleing into, or nailing into stretcher bars doesn't seem to bother most people.... but then Dave is from THAT state..... just messing with you Dave, you can shoot back on the 30th.
Maybe a clarification is in order. This floater is not the classic "L" shape, as in most. It is a straight-sided frame, with no "L" section ... straight sides, no back rest. Essentially, if the stretchers are thinner than the overall thickness of the frame, a strainer can be installed inside the frame at the correct depth, and painted black. This stretcher occupies the exact height of the frame ... so, no strainer can be installed.
This URL has a pic of it, if you scroll down ... it's called the Canvas Floater: