# LOC 7.5" V2 vs. OpenRocket

### Help Support The Rocketry Forum:

#### TMJ

##### "Where the heck'd it go!"
I'm having trouble with OR and my V2.
When I open the V2 file, in OpenRocket, I get a message concerning the fins. OR erases the fins and will not allow me to add 'any' type of fins to the boat tail.
How can I make OpenRocket play nice with this V2?

#### rharshberger

##### Well-Known Member
You have to mount the fins to a phantom body tube at the very end of the mmt, then adjust them forward.Its kind of a pain, if you ask some one may already have a file thats fixed for you.

#### TMJ

##### "Where the heck'd it go!"
Okay... I got it, just as you said, Rich, however. I could not delete that 'phantom' tube after sliding the fins onto the boat tail. Deleting that phantom tube deleted the fins, also. I had to slide 'both' the fins and that tube up onto the boat tail. My V2 now has two MM tubes in the same location! LOL

How do I get OpenRocket screenshots posted here in the forum? I just took a picture of this one with my cell phone...

Rex