I don't know if this will help, but when I was building this kit I took all the sprues and put them on edge and in order in a box nearby. This made them close enough to get to shen needed and more manageable. All I had to do was turn a little and flip through the spreus until I got to the ones I needed. I should've seperated them with some kind of lettered dividers
If I had been building my own kit I think I would have picked up the extras but I was not about to put out that much for someone else's kit. I did it on the Mogami carfrfier and never got re-imbersed tfor the set.