So there's a really good chance I'm buying this reptile rack off Craigslist. It looks to have has 42 v15 tubs, 40 v18s, and 2 v35s. (tub sizes listed, then I'm just counting the tubs of each size from the pic) Up to how many grams would you keep a ball python in each of these? I'm looking for a decent start hatchling rack.