Thanks Glenn. The later (1980s) version of the kit I built about 25 years ago certainly had the astrodome, as it was released as a 'C', with the bat nose art covering the bombardiers glazing. I've checked through the parts and sprues, and no sign of one, and no missing clear parts, and it's not shown as an alternative part in the instructions either.
No problem, I think I can mould one.
I've made a start on cutting out the entrance hatches and waist windows, but I've had to take a break, as my hands, wrists and shoulders are now hurting like hell !
First stage was to tape the fuselage halves together, to provide a more rigid base for drilling and sawing. Next step was to drill holes at each corner of the intended aperture, ensuring these were inside the pre- engraved lines. These will also act as a 'safety stop', to prevent cutting too far.
A second hole was then drilled alongside each 'corner' hole, and the bridge between each hole opened by cutting through with a scalpel blade. This allowed a 'needle' razor saw blade to be inserted, and cuts were made to join the holes.
On the entrance hatches, once the fore and aft cuts are made, the fuselage halves will be separated, and the cross-fuselage cuts made with a stiff-blade razor saw.
After removing the rectangle of plastic (which was quite thick), the waist window apertures were trimmed down to the engraved lines, using a scalpel, and then filed, at the same time chamfering the inner faces. A test-fit of the glazing shows that the rear, vertical edge of the aperture shown in the photo, requires just a touch more filing.
When it's time to fit the window glazing, either a shallow rebate will be filed into the aperture edges, or thin stripes of plastic inserted, to form a supporting frame. Once the glazing is installed, the top and bottom edges will have the curved, bulged fairing added, using plastic card formers built up with 'Milliput', moulded into shape.
The photos show the sequence as described, and I hope to get some more done either later tonight, or some time tomorrow.
Thanks to all for your interest in this project so far.