I was fortunate to find one of these magnificent kits still wrapped in it’s original plastic from a production run in 1994 recently. Started the Estes Rockets Masters series Mercury Atlas from 1994 today! As instructed I went ahead several steps and dry fit parts well before gluing. The kit was short the orange tube spacer, but everything else was there. As I was marking out the main engine tube I followed the instructions. Then when I went to fit the engine hook I realized it was way too short for the measurements given. Upon going way ahead in the directions this kit is set up for either D or E engines or at least the instructions were. I thought to myself the Big Daddy was the same engine configuration. The engine hook supplied in this kit was the D (short) version and NOT the longer E version. Fortunately the last rocket build I did had not used the E (longer) hook so I was able to re-measure and use it. The instructions in this particular kit were WRONG for the E engine mount. Had I followed them without dry fitting and wanting the E capability these instructions would have glued in the engine block way too short and ONLY allowed a D installation. BIg mistake on Estes’ part. They had the updated directions, but used the old D parts. Fortunately I caught this before any glue became involved. All is going well now and the entire engine mount is correct and modified to handle D or E engines. 
