I don't know if you know about the tides,but they change by just over 1/2 an hour every day.Sooner or later a big low will line up with later in the day.
I use a running ledger with a 2ft trace for plaice and flatties,too long a trace floats up off the bottom.
A couple of mates at the Prestatyn boat club swear by black lug for silvers.
There's a stretch just after the club from where you are with a rough bottom,they fish it when it's too rough for the boats.
I put the running ledger on the main line first,then a bead,then a clip or swivel.The trace clips onto that.The bead stops the ledger getting jammed on the clip/swivel.
Have you checked where the gulleys are near you at low tide?
That's where the fish cruise up and down.
I am probably telling you what you already know,sorry if I am.