Originally Posted by Peter_C
Simple, don't let it touch sharp stones.
Where do you foresee having it touch sharp objects?
While dragging it up a beach? Don't do it without transom wheels.
Accidentally hitting something in the water? Get a depth finder with an alarm, and be careful.
Yep second all of the above.
The bigger the tyres on the transom wheels, the easier it will be to pull the Sib along a sandy or shingle beach.
I use a cheap roll up foam camping carry mat when I bring the Sib out of the water onto a stoney / shingle beach.
Roll the mat out and pull the Sib out of the water with the wheels .
Use the mat as a barrier to rest the floor / keel of the Sib on whilst it is beached.
I use a strong galvanised pole and rope rig up to help me get a better grip of the bow - see pic.
No mat in the pic as sib is on a nice soft sandy beach.