I think it all depends on what you want to gain in sap yield. Some people are going for the natural vacuum and others aren't some have vacuum and others don't. I am assuming you are not running any mainline. I would suggest that if you are looking to go to 200 taps and you would like to have them all drain into one common collection point that you try some mainline and make your lateral lines from your mainline to your trees as short and tight as possible and then try to limit the number of taps per lateral line to 15 or less if you are staying with gravity 7 or less if you are thinking about vacuum. If you are interested in trying to get natural vacuum you can run the laterals a little longer and have a few more taps in each maybe 25. CV spouts will keep your tap holes open longer on gravity just like they do on vacuum.