[Ian Robinson]

Try using other stars as they transist (and your setting circles, can you get altaz reading from your handset ??) together with a compass (and the offset magnetic north) , come to think of it , probably don't need transitting star for this.

You'll need a package or set of tables that gives the altaz for the chosen "aligment stars" so you can compare your alignment and make the appropriate south alignment adjustments ((east or west) assuming your mounts angle of the dangle for your latitude and levelling is right ).

That is one way I used to it when I had a similar problem with horizons.
I knew nothing about drift alignment at the time.

--- I'd move the scope to somewhere that gives me a clear shot at the SCP , it's easier.