Mounting holes : The Cassegrain A&G has two sets of mounting holes.
One set consists of four circular patterns of 12 M10 tapped holes
with PCDs of 362, 457, 508 and 635 mm. In addition there are rectangular
sets of 4 M16 tapped holes, with spacings
460 mm 1072 mm, 600 mm 1072 mm
and 740 mm 1072 mm.
Maximum mass and moments: For instruments mounted on the A&G unit,
the maximum load on the M10 hole set is 200 kg,
and on the M16 hole set is 500 kg.
Clearances and volumes: Instruments must have a length
of less than 1300 mm.