elevation tube holder: insert 1.4mm pin to center of these two part and cement
circle part with 1.4mm hole
is just used to align elevation tube holder center, do not cement it.
to avoid interference when inserting elevation tube holder
Tamiya 5mm square beam, drill it with some 1.6mm hole at 10mm pitch
block with 2mm hole
block with 2mm*0.4 thread
plastic sheet on top block
top block elevation tube holder, bottom block to turret roof. Do not cement top
and bottom together.
small piece of Tamiya 3mm square beam, cement it to recoil unit, drill
with the screw come with servo
end and servo arm