I've been out of the EZ Robot loop for several years. Recently, someone followed up on a forum post I made, and it reminded me that I still have one of these things. It seems that a few things have changed, so I have some questions to get up to speed.
1. It looks like the new Synthiam isn't a brand change, but an addition to the business or something, because EZ Robot is still a website. DJ Sures changed his YouTube channel from EZ Robot to Synthiam. It seems that there's more to Synthiam than just EZ Robot now. Is there a blog post explaining this anywhere? What happened?
2. I have an original generation EZBv4. Is this upgradeable to the new one? Do I need one of these, or a whole new controller? https://www.ez-robot.com/Shop/AccessoriesDetails.aspx?prevCat=9&productNumber=51
3. Does the EZ robot software let you use a custom robot yet? Waaaay back in the day, I wanted to use the EZ Robot controller with a RoboPhilo and could never get anywhere with the software. There was no option to add servos or build anything besides the EZRobot robots. I watched all the tutorial videos at the time, which meant that I watched more than what was available (it was a bug where someone coding the website counted off by 1), but none of them had anything to do with using custom robots. I'm not sure how other people at the time were DIY'ing other stuff with an EZBv4, but I couldn't get it to work. When I asked for help, I was told to watch the tutorials, which had nothing to do with what I was trying to do.
A while back, I got an email from EZ robot, and on a whim I replied to it. The guy was nice but had no idea how to do what I wanted to do (See above paragraph) and suggested that I read some of the new tutorials.