I never knew why some of the OLD Timers calles them SinkCrafts till I saw what You have,Drains thru the Hull ? I had the same problem on My 20' . Sitting, water poured in, always used plugs also.I went with ball scuppers & flaps over brass tubes for the splash well.Well I've only used My Baby twice ince I've finished Her.The ball scuppers still let water in , not as much as before.I hav'nt really put Her thru many test Yet.(Just happy to run to the Keys for a Blackened Fish sandwich!) Backing down,anchored,Fishing etc. just sitting and walking back to the stern water still flows in. Maybe because I have them mounted to close to the trim tabs ? I still prefer these to the SS ones that were on before.They flooded the deck anywhere !
Scream'n Reels'