Well congrats on the bp, but tanks are not the best thing for balls. Especially a brand new one in a 40 gallon. I dont believe any tank is too big for a settled in snake, but at first i think a small tub is best. You can make a tank work, but it will be alot harder than using a plastic shoebox/bootbox enclosure. Glass lets out heat immensly and the screen top does an awful job of keeping in humidity. But to cover the basics for your tank you will need two hides. Skip the half wooden logs and go to the dollar store and buy some plastic bowls, cut holes in them and stick them in there. Its shouldnt be much bigger than the bp can fit in. Then busy up the tank with some fake folliage, since it is such a large tank. Give him a decent sized water bowl on the warm end to keep the humidity up. Cover the top of the enclosure with tinfoil or towels for heat and humidity. I would also cover at least 3 sides on the tank with black construction paper, if not all four sides, for at least a week or until he starts eating regulary. The hot end should be 88-92 while the cool end should be 76-80 with an ambient temp of 80-82. Also go buy a digital thermometer, the dial once are crap. And a temp gun wouldnt hurt. Also to keep humidity up, try not to use a heat lap, they basically zap all humidity out. Use an UTH with a THERMOSTAT. The thermostat is a must so your bp doesnt suffer burns.

Well thats what i have to say for now. Im sure other people will fill in the holes. Good luck with your new BP and congrats.