TTW fin tabs on smaller fins w/tip to tip

[Voyhager3]

I've been cooking up a new design and found something I like (below)

It is a 5.38" cardboard, fully glassed with tip to tip glass, and will have a 75mm hole so I can run a prototype modular motor mount thing, but it will mostly be flown on K's and maybe down to I's. Quick note, the fin tab is not supposed to be there I just noticed it, so disregard it. My question is would I need to do fin tabs on the upper (smaller) fin? I would assume not, but I would like to be certain before I finalize it, and draw up a cad, and send it over to @DragonRocketry because I'm also going to ask for a custom 5:1 nose on it , and I wouldn't mind having the fins be all nice and professionally done, and that I'm too lazy to get certified on our CNC machines.

Also, fins will be 1/4" ply.

Thanks,
Jacob

 

[DragonRocketry]

Those forward one do not need to be TW. When you go to install them take a 1/8" drill bit and put little dimples into the body tube just through the glass. Then just do tip to tip over them.

 

[Voyhager3]

So i just found out that I'll be able to do a fully carboned build (cardboard with full carbon-wrapped tube and tip to tip), so should I even bother with fin-tabs at all?

 

[DragonRocketry]

So i just found out that I'll be able to do a fully carboned build (cardboard with full carbon-wrapped tube and tip to tip), so should I even bother with fin-tabs at all?

I would just for that extra insurance. Just because you are using carbon does not mean they still cannot be broken off.

 

[Tractionengines]

Just food for thought... broken off surface mount are a WHOLE lot easier to replace than broken off thru the wall.... ( most of mine are TTW... but every time I'm replacing a TTW fin, this thought goes thru my head. )