Here's my stock build measures up next to the Estes numbers from the box spec card:
Estes finished weight: 11.0 oz. (empty, no engine or wadding)
My build finish weight: 11.53 oz. (empty, no engine or wadding)
My build flying weight: 13.21 (D12-3 engine and eight squares of Estes wadding installed)
My center of gravity (loaded for flight balance point) is 15 1/8" from the rear.
The height of my Saturn V build is the same as the Estes kit spec. at 43.25" tall.
Remember, I added a Monokote trim piece around the service module tube. This shouldn't be much heavier than a coat of silver paint. I probably build heavier and use a little more spray paint than the average builder would.
In the 1974 Centuri Catalog, their Saturn V (close to this reissue) weighed in at 9.2 oz.
In the 1974 Estes Catalog, their Saturn V weighed in at 9.9 oz.
In the same 1974 Estes catalog, the maximum lift-off weight for a D12-3 engine is 14 oz. So my Saturn, weighing in at 11.53 oz., should be fine with a D12-3 engine.
That is - if I ever get the nerve to fly it!
High end and low end!