Despite the crushing heat, I was able to print everything in a few days thanks to my 5 Ultimaker UM2+.
The main body is locked to the humongous canon part with PVC tubes and a metal rod to straighten everything. At this point, nothing is glued. I usually glue everything near the end of the project, after base colors are applied cause having separate parts eliminate the need to use mask tape and thus makes painting way easier. But before I can do any painting, I need to fill and sand down everything multiple times to get the surface smooth. I usually raw sand at 80 (120/240 for detailed spots) first, then apply a few coats of filler, raw sand again and fill one more time before doing some wet sanding (120/240)
And here is what I have so far. I’m gonna do a couple more sanding/filling sessions with 240/400 sandpaper and then I’ll be able to prime it and start painting it.