Doug J;
That is a good purchase and Jackdaw and others would agree. I will be glad to talk to you about the hand tensioning if you would like to on the phone. let me know if you want my number.
As for the request for the additional pictures, let me explain. The port crack at the lip of the hull to deck joint shows a crack thru the deck portion of the glass extending backwards with a slight crack what appears to be in the 5200 that marries the hull to deck joint together. I looked at the new photo and see dents/cuts in the black inserted portion of the rub rail. I think that may have been caused by a hit from the previous owner but cannot be sure. If it was from the forestay issue, then both sides should be cracked in a sense.
As for the strap under the U bolt nuts underneath, not sure but it may have been overtightend resulting in that hairline crack in what to appears to be only in the gel coat. It looks bad but cannot tell since I am there. May I suggest a slight or small 1/8 inch hole only in the gel coat to keep that crack from extending further and go ahead and repair it. I pretty sure it looks fine but I know your concern. You did say the rig was over tightened by the previous owner.
If you want to call me, send a private message and I will send you my cell phone and then you can decide but I would suggest against any gauges as my experience rigs over tightened.
Here is a Hunter 26 I am working with the new owner to correct this but waiting on two addl. photos of the shroud turnbuckles.