I pulled measurements and laid it out before I cut the old stringers out so I could replicate just not really sure how to make the form. I would rather go back with the trapezoid stringers as that’s what the boat was engineered with and I know they’re pretty strong. Any info on how you made the forms ?

Glad you did that. Did you get measurements to the top and bottom of the stringers? That would tell you how tall they were and how tall to make the forms.
Here is where I started https://classicaquasport.com/smf/index.php?topic=10101.msg89831#msg89831

I started by using 1708 for each and then joined them together, If I had to do it over I think I would make a 16ft long mold so I didn't have to join them.

Joining them https://classicaquasport.com/smf/index.php?topic=10101.msg90053#msg90053

Layout/planning https://classicaquasport.com/smf/index.php?topic=10101.msg90478#msg90478

Update on joining the stringers https://classicaquasport.com/smf/index.php?topic=10101.msg91891#msg91891

Scribing the stringers https://classicaquasport.com/smf/index.php?topic=10101.msg93388#msg93388

Anchoring the stringer https://classicaquasport.com/smf/index.php?topic=10101.msg95291#msg95291

I pulled measurements and laid it out before I cut the old stringers out so I could replicate just not really sure how to make the form. I would rather go back with the trapezoid stringers as that’s what the boat was engineered with and I know they’re pretty strong. Any info on how you made the forms ?

Looking to buy a pnuematic straight line sander, anybody have a recommendation on brands?

You could do either. I built my trapezoid stringers from scratch with 1708. If the stringers were not in the boat when you bought it you don't have any measurements from the cap down to the top of the stringers, to go by. Have you replaced the transom already or do you still have the evidence of where the stringers attached?

Question what size was the fillet did you have to use to close the gap from the stringer to the hull and did you use 1708?

Thanks, Larro... I can't believe that with all the pictures I've taken, I don't have a good one of those stringers after the reinforcement was done. It wasn't a traditional fillet and cloth as you might expect. We initially sprayed the gap between the stringers and hull using a fiberglass chop gun, then a layer of 2415 woven roving mat was laid into the corner over the chop, and then another layer of chop was sprayed on... then it all gets rolled in with the resin that is applied in each of the 3 layers.

The only picture I have shows the inside of the stringer (not the outside gap that you are probably asking about) and it has been coated with gelcoat so there isn't much detail to see. The unpainted portion is the top of the stringer - it runs down about 8" and is blended into the hull before it steps down directly to the bilge. I'm sorry I don't have anything better.



In other news, I finished installing a new thru-hull and seacock, and a new bilge pump. The final (aft) deck section was installed and the deck edges were glassed up onto the liner.



This is a birds-eye view of the same stringer section mentioned above.







Thanks,
Paul