While your care does look better, and your monitor healthier, than most others', your husbandry doesn't appear to be quite up to par. While yes, you have some dirt in your cage, it appears to be very shallow and is in a small area. I'd recommend filling a whole cage with dirt and filling it with a good 8-12 inches of soil (for a monitor that size). Good dirt is especially important for nesting females, which will require at least a solid couple feet of it. What are the basking temperatures in your cage?
As far as breeding info goes, good specific info on savs is very limited. But there are plenty of great monitor keepers/breeders here and at varanus.net. A few the top of my head include FR (Frank Retes), Robyn@ProExotics, Mike's Monitors, and several others. One good thing is, good monitor care is pretty universal. So what Mike says about his peachthroats, or Frank about his flavies, or Neal Egge about his storrs and caudos, will probably apply to your savannah(s).
Good luck. I look forward to seeing CB baby Bosc's in the future.
Cheers,
Ryan
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