Hi Dick,
It's great to follow your restoration. The model looks really good. I had one when they came out, and pretty much forgot about it over the years, but several years ago started trying to find out about it - I couldn't remember much at the time, but tracked it down via the internet. I would love to have one again (along with the space station) but the prices now are so out of sight as to be virtually impossible.
My recollection is, the Stage 1 boosters were not actually intended to be glued to the cross pieces - they were a press-fit, so the boosters could be seperated away as their fuel was expended. Then the Stage 2 boosters would be dropped behind, leaving the conical fuel tanks attached to the passenger ship, along with the solar generator section which attached over the tail. those parts would then be removed after lift-off from the moon but prior to reentry.
Ninfinger I believe has the "Mission" booklet scanned in, along with the instruction sheet and decals. Duplicate decal sheets are available and can be purchased on line.
Great model. In my memory, the support arms actually fit pretty well with the booster sections, so I am not sure why yours does not. Not that it matters - it looks great.
jon