cracking and humidity control

[Dave Watts]

Hello,

I just bought a bass (1900 german flat back) from a super dry climate and brought it back to, what should be an equally dry winter climate. The bass is a flat back and has some cracks on the back that were repaired. In the past couple of weeks most of the cracks have opened up. I'm holding off a little bit in having the cracks repaired because I want it too settle more and I'm also worried that it's going to begin to freak out once the humid summer comes. I have an appointment to have the bass set up with my Luthier in a month, and at that time he can assess the repairs that need to be done. My question is should I humidify the bass at home, even though I'm not home much with it? I always thought, perhaps wrongly, that if you're always taking an instument from a humidified room to a non humidified room, it's better just to the let the instrument the same humidity. Also my understanding of a flatback was that when the bass began to take on humidity that because the back can't swell like a round back, the back will begin to crack.....am I wrong? In any case any advice would be greatly appreciated. Also if it helps I could take some pictures of the back cracks.
Thanks in advance,

Dave

PS. I do love the new (very old) bass!