i used to lift this out with strops underneath along with work borrowed wooden spreaders that held the strops out over the tubes...i decided that the tubes were still being squashed so after a chat with ribcraft i fitted 4 12mm U bolts and use 4 1000kg strops shackled on with 1500kg tested shackles.
works a treat !!
i also lift the boat to bleach the bottom (missed a bit in picture
the stern ones are through the transom about 4 inches off the deck and the 2 bow ones are as close to the deck as possible (ribcraft said down low as there's more glass matting there)
all the U bolts are packed with sikoflex though the hull and backed on the outside by 5mm thick stainless flat. (you can see one in photo)
i was very nervous of the first drill though the hull at the bow..but the plate sits nicely on a flat chime
only downside...stubbing toes on the U bolts !