Over shaped tail rail

Hey, I overshaped the bottom rail tuck all the back to the tail. I screwed up in front of the fins and this seemed like the only way to get the rail line back to normal. So I brought the tuck all the way back to the tail. It may have been a big mistake, but the rail line doesn’t look all jacked up now.

Im looking for insight on possible solutions to fix this? Will it affect the board function at all? Can i just build a damn in the hotcoat phase and make it sharp again?

Thanks for any advice.

look i am no pro shaper, but this is what i would try…
round it up, and then when you hotcoat build up the edge with resin.
tape the rail leaving like 2 mills of tape above the rail and then let the resin from the hot-coat build an edge, if all goes good you get a square edge back. (level the tail so this works)

on the other hand foam doesn’ t grow back so overshaping can be an issue…leave it like that…ride it, maybe you are into something new…who knows, next thing all JS surfboards come with a tail like yours.

cheers and good waves

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Its going to make the tail feel narrower since the planing surface in the back has been decreased. In the end, its not the end of the world. I don’t know your measurements, but if the tail width allows you to take off materials on the side to shape the tail section of the rail as you please, then it might be worth it. Or, you could put a wing which would also let you do that. In the end, part of the fun of making homemade boards is to experiment - even if its accidental. You could dam resin but that area looks very large and it would be heavy and annoying to do.

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This is the way it is supposed to look. You can make the edge a little sharper with a resin dam after glassing if you want.

In order for the hard edge at the tail to blend into the rail going forward, it has to be tucked in a bit from the edge. If you put it out on the edge it will look wonky at the point it blends in just ahead of the fins, and look like a typical beginner shape job (IMO)


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sweet that’s a great idea with the wing, i didn’t think about that. I think the tail is 15 inches at the 1 foot mark. Problem is, I worked so hard to get the outline perfect, I would hate to disrupt it. I may glass it, surf it and see how it feels. If i don’t like it then i’ll add some resin to the tail and try to build that edge up.

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Yeah I understand that. It’s a homemade board so it’s never going to be perfect, but that’s what makes them fun. I think sometimes it’s best to not second guess yourself and rework it because then you may make it worse. But, if you end up changing the rail shape you can potentially make it closer to as you desire.

Yes your back bottom rails are probably going in too much compare to modern rails standard You should do the hard edge from one foot to tail with resin but keep your “round” rail profil. It will be a bit more in wave than the standard square rail, giving a bit mre drive feel, not a real problem with this kind off shape.

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A hard block and 60#

My advice to a beginner is, as you mentioned, glass it, see how it rides, and maybe add resin later by tape-damming.

Retemplating and reworking the tail and tail rocker might be a little risky.

Not sure if you live by any pro shapers and not sure if you are up to it, but you might want to hit one up. You might get a generous one that will make the best correction considering the circumstances.

If you glass it as is, you still might get enough release from the tail.

I think there was a point in time when short boards had that degree of tuck, and people enjoyed surfing them.

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Very easy fix. Put your sanding block on the rail line just up from where the fins are going, and drag it back to the tail (both sides), Then blend it into the middle of the rail by using slight pressure and moving it towards the nose to blend it in. Then screen it

A hard block and 60#.

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Use a higher grit. You would be better taking multiple passes. You can always take off more foam, but you can’t add more once it’s gone. Use your eyes and blend it into the mid board rail. Then screen the whole rail nose to tail and back a few times until it all flows. This will actually add more Vee. Keep looking up the board tail to nose

Yeah not meaning to be aggressive, but 60 or 120 if you’ve got to-remove some foam and get it to flatten, get rid of that tuck. Then as you instructed; blend it Tail to rail and screen. You can always get rid of an over tucked rail with a hard block.

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You could make the board slightly shorter by moving your template forwards.
Theirs alot of curve in the tail of the board so it would only end up 1" sorter at the most