Confused with Madcow’s Tomach’s 3 fins

[Five]

Madcow Mini Tomach

I’m a little confused on why the body tube has four preslots but the kit only comes with three fins.
Can anyone clear this up for me so I can get some peace of mind before I build?

 

[Five]

Im wondering if I got the wrong airframe?

 

[crossfire]

Yes you have the wrong tube. If you have some plywood cut out an extra fin and have the only 4 fin Tomach. Or call MC and get correct tube.

 

[Five]

I thought so. I just needed a second opinion…thanks

 

[crossfire]

But it does look like a tube for a split fin rocket. You need a new tube.

 

[Five]

Madcow kindly corrected their mistake and sent me out a three slotted airframe.
I haven’t launched it yet because its has been way TOO HOT outside.