My liner was a custom order size for the pond. So this was just an attempt to get a intake bay for leaves but ya, I am not good and seaming and OK with that. At least I was able to remove it at the seam and just build the dirt back up like nothing happened.
I'm in the process of building a custom adjustable level skimmer now, hopefully will be done prior to fall but with my job, yard work (overseeding / installing rest of irrigation) and family time... its getting tight!