NavList:

That looks lovely Geoff.  It’s very similar to mine.  It’s the fun way to do back-yard celestial if you’re not a 1/10 minute of arc fanatic. One advantage over liquid is that the edges of the bowl don’t get in the way of low shots. I found the hardest bit was working out which was UL and which was LL and how to deal with SD when you’re working an extra mirror reflection.  I had to keep working it out again every time I used the AH.  The availability of Frank’s GPS spoof means that the odd 16, or 32, minutes difference means you’ve probably got mixed up.  One way to avoid that is to try shooting a few bright stars.  Then you don’t need to bother about limbs.  DaveP