I have searched, but I'm not finding anything that clearly spells out the how to when it comes to measuring the inverter of a DRSSTC.  I do understand that I need to measure the bus to check for ringing and adjust for phase lead possibly.  I understand that you need to measure the current of the primary on one lead of the oscilloscope with a PT. And the other simply needs to measure the inverter bridge output.  I understand that I need to adjust phase lead to take care of any ringing on the IGBTs.  And measuring the primary current with the PT will let me see the current peaks and adjust my OCP from there.  (Although I believe I can simply limit that by adjusting the voltage on the driver at the probe points of the comparitor circuit)

So I started out with a Aliexpress coil.  Blew a number of IGBTs simply pushing it to hard.  I have built a new inverter (This one to be exact https://github.com/WaskaLabs/Fullbridge-Bus-V2 with FGA60N65SMD IGBTs).  I also swapped GDTs as the cheap Chinese made one that came from the first coil showed some ringing when I scoped it with a signal generator.   The new GDT does not show all the ringing of the old one.  I also used cat6 wire to wire from the GDT to the IGBTs.  And made sure the lengths of wire were all the same. 

Now for equipment.  I have a hantek DSO5072P scope.  Currently only have 10x probes for it, but I ordered a 100x.  I also have a variac as well to power up/limit the voltage of the bus.  I also have a isolation transformer I can use with the scope as well.

So is there a "how to measure your DRSSTC for dummies" guide or video out there? 

And for my specific case, I am correct that one lead simply is connected to the output of the inverter bridge to the primary correct?  Do I probe before or after the MMC?  Can I probe with the 10x if I keep bus voltage very low or should I just wait for the 100x probe?  Oh yeah, the primary current PT.  I was going to try to get by with simply looping the ground loop of the probe around it and try to measure from that.  Or can I use the coils PT?  I probably have a PT laying around somewhere I could alternatively use.  (I think I know where it's at from a broadcast transmitter I scrapped out)