Ok,
May be i am mistaken in my limited understanding. Will stop here. Still not knowledgeable enough. Will have to investigate further. It still though is quite mystery to me how Mach3 passes trajectory data if it sends only pulses, meaning the card doesn't know whats next or what to expect. May be it has to do something with the drivers/plugins for each card and mach3.

No problems with the BOBs :-) , just want to make sure they do all what they claim to do and don't mislead us in some subtle way. Want to be a wise buyer and make sure where my $ could do a better job.