Mine isn't as purdy as yours but .....
A couple things. One, the scale/base was leveled both front-back off the agate bearing mounts. Two, under the leveling adjustment is a steel bushing for it's 'nub' to ride in. Three there are two angled pins, one each front-back on the right side to locate the scale body and finally four, I put a few wraps of teflon tape on the leveling screw threads to take up the slop.
With the bushing and pins it can't move during use (fat fingers!) and can be returned to its exact position if removed some reason. Oh, the bubble level? Its only an error indicator. If it's off and or I would need to level I know something isn't right, but I haven't needed to touch the level adjustment in the last year and a half after having it off a couple dozen times.
The pan and pan support? The support is from an old D7 and the pan a Lyman funnel pan. The D7 support allows more room ( fat fingers again!) to put the pan on and take it off than the 505's and the funnel pan eliminates the need to transfer the powder to another funnel when charging a case. I throw, weigh, dump and repeat.
Bill