I have never had problems before with wood bunks, but I killed that record this weekend. Purchased a Spark last week, and had it on the water this weekend. Had a bunch of young men pick it up and carry it to the water - then 2 sat on the trailer bunk and broke it in two. I know the trailer had a bit of distance between the bunk supports - but kind of bet the factory bunk had a very bad knot in the wood.
considering replacing with synthetic bunks, but have not read anywhere how they work with the plastic spark hulls. Have heard people having issues with them on fiberglass hulls.