Been trying to get more zoom than just level 17 with iD and Potlatch. I tried using browser zoom view, which is quite usable for Chrome and Mozilla, but doesn't work with IE. It didn't work with Potlatch either, the satellite view remained constant regardless of browser zoom level.
Also, using iD on 19in monitor with max browser zoom, will leave about 2 inches of vertical editing area. To get best alignment, I left out the tagging process for later so that I get to trace with thin lines instead of the fat iD highway line types.
It was a slow process. I'll rather wait for better imagery (or JOSM implementation of iD zoom interpolation) for those areas, which we'll probably get in 3 years. Hopefully!