@Alienbeef0421 because i dont know, i have never tested custom missile designs before

I used a rocket pod before, but why not bind the ejection and ignition to a single activation group? @AstleyIndustries

@Alienbeef0421 not sure how to help then, or you can try this:
By creating a missile thrust pod:
1. Build out the pod, big enough to contain a missile yet just small enough so it fits the missile perfectly. Mass scale if pod is too heavy
2. Put a detacher in it, and then a missile on the detacher. Use a small scaled detacher and remove its collisions. But do not remove collisions for the missile.
3. Connect pod to detacher.
4. Connect Boom 50 to pod. Disable its collisions and nudge
5. Test. Note that this requires two activation groups

I tried dat before but the game crashed @AstleyIndustries

By fabricating new attach points:
1. Connect the boom 50 to a detacher of your choice
2. Grab a missile from the part selector, but don't connect it to your creation
3. Go to the xml file and create 2 new attach points; one for the missile to the detacher and the other for the missile to the boom 50
4. Use fine tuner to move the missile into the boom 50
5. Test. Remember to make the detacher use activation groups.

Note: if the boom 50 is too heavy, the missile cant fly. Mass scale the boom 50