MIRROR CELL ASSEMBLY

The picture above shows the mirror cell assembly, it is composed of two main parts; the base plate-which is bolted to the interior of the tube (you can see two of the brackets)-and the top plate -which holds the mirror and can be aligned using the spring loaded bolts.

Between the exploded view below and the pictures above you should be able to work out assembly details-top plate A has holes drilled for dowels (partly cut out) to hold mirror-some depressions are part drilled in surface to accept silicon adhesive to hold mirror in place-use a few nails between mirror base and plate A surface to act as spacers. before this drill holes for dowels and to accept bolts-coutersink so bolt heads are below surface and will not contact mirror-plate B has holes for bolts -bigger dia than bolts to allow some free play- and a hole in centre with a threaded insert put in-with mirror secured, place springs over bolts-put on bottom plate, screw up nuts and you can see that with plate B secured in scope that the mirror can be aligned by just turning the nuts (or wingnuts) once aligned you screw a bolt into centre hole until it contacts plate A and locks position

This is a view from the base, you can see the 3 brackets for securing in tube, the 3 adjusting bolts and the central locking bolt. You can also see the dowels which are used to hold the mirror in place in the top plate; from these views, the following sketches and my technical description you should be able to build this to suit your dimensional requirements.