I marked off the MBT with an Estes marking guide.
I then noticed matching up my engine assembly to those marks, that I had a problem. One of the brace sets was off more than was acceptable to me, so I broke them out, whittled down most of the wood and glue left on the tube, and sanded the rest of the way. They were strong at least when breaking them.
I then made new braces, conformed them, etc. like in my former post. It looks better now. In retrospect I would just spot glue the braces, sand them down to fit in the MBT, and check alignment then with the MBT. I could easily break out any not in line and re-place them, and avoid a bunch of sanding inside which I can see in my future. I would also just mark the centering rings on the exhaust tube from the body tube marks, after gluing them on, and use those for a reference. Next time I think I may do a good job on one of these TLP missiles with a tail cone. I think including your mistakes in a build thread is a good thing, for those that come along later. (Paying it forward.) I have no pictures of all this, as I already have 5 for this post.
Now back to progress instead of fixing mistakes. I extended the marks for the fin placements. I need to get one of them there long aluminum angle thingies I've read so much about to extend these lines later for the forward fins.
I modified my drawing a little with a pencil, to figure out the fin tab dimensions, as well as the fin slots. 4mm from the end, and 57mm for the tab is what I decided.
I then added the width of the fin tabs, 1/16" on either side of my center line. I know, I'm switching back and forth between measurement systems, but the fins are 1/8" thick. I thought they were going to fix this problem 30 years ago.
I then applied my drawing measurements for the location of the slots on the body tube.