I am currently building a Corbie 6 from cedar and ply decking. Despite what I thought was minimal internals I have estimated that It will be 100gms overweight. I have removed the cedar strip foredeck reduced the foredeck bulkheads to skeletons sanded the internal hull which was light epoxy coated back to a minimum but only achieved 50gms back. Now going to re-make foredeck in ply which I hope will achieve enough saving.
I appreciate that on occasions a bit of extra weight can be helpful, but when racing knowing you are overweight is always going to play on your mind and the reason you blame the boat not the man on the sticks. I am surprised that West Epoxy is used on some builds as it is much heavier when used as a coating. I also I think their can be a marked difference in the weight of cedar and any other planking as you buy small amounts and have a limited number of suppliers who are not on your doorstep.