There are numerous trains of thought but most feed every 5 days until they reach a certain size. Some feed every 3-4 days until about 3-400gs and then run it at 5 days. I do my BPs at 5 days once up to size and my Boas at 7 days usually and then less frequent with age.
For your chubby guy, wait 7 days to see if he poops. If not then start the 5 day feeding until he poops and regulate his diet accordingly. At 348g its not obese. Obesity is an adult sized issue. Some power feed and they say it shortens lifespan to be powerfed to breeding size.
Good luck and you did excellent on your first forum post. Pictures and all.