Glad you like the PT! I think this is a super idea. Looking forward to hearing how it turns out.
I think something like guar gum or xanthan gum, which will thicken (but slowly) if added to a room-temp liquid like CK, could also step in if the flax doesn't wow you. They'd give the gel thickness and more clumpiness. Guar is a little "softer" than xanthan, hold wise.