Thanks for the invite. Interesting to get in on the ground floor. Im new to the art. I picked up an used Astra IIIB for a great price on ebay a few months back and have been reading and learning. Ive taken several shots now using a bubble horizon. So far Im using an app to do the reductions. Cheating, I know. But its the only way to tell if Im doing it right, and comparing it to GPS position. I need to crack the book again and get my current almanacs and do some real reductions. Anyway, cheers!