Hello Guver, I am very pleased indeed you have contributed to this thread. It is not "my thread", although I seem to have written most of it. I would be very grateful if more people might contribute to this thread. I hope that many more people will contribute.

As for the: Tower Hobbies30A ESC, for Flyzone Millenium Master - http://www3.towerhobbies.com/cgi-bin...LXCLCV&amp;P=7-I notice it is labelled as: "<span style="font-size: larger">XP-30A-SW-F".
</span>Another ESC labelled similarly is the"X Star XP-30A-SW-F" Brushless ESC - http://www.ebay.co.uk/itm/X-Star-XP-...-/280790477685And another ESC labelled as "XP-30A-SW-F"isthe Overlander onehttp://www.overlander.co.uk/xq-xp-40...-esc-1041.html Overlander ESC's are known to be made byXingQiong Technology ("XQ"-Control)http://www.xqcontrol.com/en_index.asp and also XingQiong call their range of ESC's "XStar".
I agree with you, that the 30A ESC labelled as"<span style="font-size: larger">XP-30A-SW-F"</span>is made by XingQiong Technology. In general, it seems that ESC's labelled as <span style="font-size: larger">"XStar" </span>or <span style="font-size: larger">"XP-" </span>i.e. "XP-30A" or "XP-60A-SW" are made by XingQiong Technology. Of course, if they use a particular programming card, then it is usually easy to identifythe company that makes a particular brand of ESC.

As for the other 18A and 30A ESC's, they arenot labelled with anything at all, and there is no program card to identify them. So it is difficult to know where they come from.
I do agree with you, however, thatthe 25A ESC for Hobbico Flyzone SkyFly Max,at least looks like theXingQiong XStar XP-25A -http://www.xqcontrol.com/en_showProDetail.asp?ProID=15 -with black heat-shrink rather thanblue.