THanks again! Support arms are already in place, but the mount foot is attached with 4 screws like in a "T" pattern, two on top, two in the middle. I may install two missing screws into bottom holes, or leave holes filled with a roof cement as of now. Good thing, the rain will not come here till winter, so I still have some time to watch TV!
Sad thing, I missed a rafter. Here is, on my mind, a good article, how to install dish properly, worth reading:
http://www.dbsinstall.com/Whatis/Whatisgood-3.htm
But idea with the silicon caulk is also very good.
Well, now I will go on with alignment and cable run. I spent an hour and half on the roof leveling the mast, and finally found that
angle locator was incorrect! Ended up with bubble level, and angle locator showing 2 degrees (positive) from both east and west of a mast.
But it's for different thread, I want to post a little review of tools, I ordered .