Just goes to show Paul, it's not as easy as some might suggest.
A big scope you have really, 9 1/4 with its flatter field than most SCT's; would have been very good for this, but not the 130mm refractor that's interesting!
You did everything right as per list, so well done!
PS: A personal first too. Sirius B is something every Amateur should bag.
bigjoe.