The lower end of the arms are sanded gradually to align them horizontally and with the central body.

The hangar parts are digged to let my square tube (for a side standing system) go through to the side.

top part

bottom part

To be sure to be perfectly aligned, I used a miter saw

And then I realised I had to dig a channel otherwise it will not join between the top and bottom

The Galactica is impaled!

The locations of the viper launch tubes are holowed to install later the new parts

The location of the electric connectors is hollowed in each hangar.

To attach the 2 large parts (top and bottom) of the hangars, the facing surface is not wide enough. And in the rear side there will be a detailled interior, so I had to work with as is..

The forward side are held firmly with wooden blocks screwed together and with the parts.

The front of the hangar held with rods of 4mm. The holes are larger than the rods. I used some resin to fill the remaining space while adjusting alignment
The part and the wooden block are now one.

At the rear, the rods alone will keep the part.