H Two things to try.
Calibrate the compass every time you need to locate sun/moon BUT, here's the important bit. When you do so, make sure you hold and spin the unit as level as possible. I find the calibration progress bar can slow way down and seem stuck and it's tempting to try some different angles (which usually makes it complete faster), but I discovered that tilting it off axis at all can really severely confuse the compass. So I just keep spinning it on the same axis, until the progress eventually completes.
Level to within .1 degree. Yes .2 should be enough, but success rate will go up with 0.1
Manual methods.
For the sun I have a 3d printed sun finder which I can rest on top of the moving part of the scope pressed laterally against the non moving part to maintain horizontal alignment, and I can manually drive the S50 until the tiny sun spot is centered in the back of the finder, and then it's close enough to centered in frame (with filter on) to finish looking at the display.. This one is super reliable. For the sun, I'll use it every time.
Some folks use the gap between the two parts of the scope. When you manually drive the scope laterally at some point the sun will shine through the gap and you'll see a sliver of bright light cast onto your hand held behind/below the scope. Once that is centered, you can drive it up or down until the sun appears in live view.
