You will be fine. Its rare that a plug comes loose in a head. The difference between 10 and 20 ft. lbs is not substantial.Thanks for the help! I did them today and it worked out better than I thought it would I just took my time and did them one at a time (only the top eight).
I torqued them down to 120 in/lbs (10 ft/lbs). I hope that is enough!:4-dontknow: