ive been reading up on this for a while now and i would like to try to make one of these sometime, not sure what size yet. but 1 major question i gotta ask is, the pond liner will be a 1 peice rectangle, so when placed into the frame, how do you get the folds in the corners and stuff to not show? unless you guys are not using 1 peice liner but multiple and just using pond liner tape to seal them together? but i dont see the multiple liner as a good hold, i fear itll let off over time. please help clear my mind!