Larry
A different jet size is required for natural gas. The Q120 is designed as a portable BBQ hence no natural gas. I would leave it as a bottled gas unit.
Thanks Phil, .... Yeah, after pocking around a bit I found out that natural gas burns hotter. Talked to a guy that hooked his propane barbcue up to natural gas, and while it burned hotter and he had to watch the higher heat, it worked out fine. Don't want to take any chances though and mess up the 'Q.' Portable's fine. ...Thanks again!