Hi Dennis, I dont own any of the 3 you mentioned , but I have built and owned many Newts over the years and now have a Takahashi Mewlon 210 and the columination of that scope is a little different to a newt , but it really only took me a few tries , a lot of reading to get it spot on .
I found it is much easier with 2 people , one looking at the defocused star pattern and me turning the secondary screws ( Taks dont have a columinatable primary ) a tiny little bit ( really tiny < 1/8th a turn) to get it perfect , and WOAW! you know when its right , the images are so very good ,APO refractor like it is that good !
Brian.