Hi @SaferHarbors,
I’ve previously done a breakdown of the OTPS with T200s. It should be reasonably straightforward to re-run those calculations with the number of T500 thrusters you’re interested in using, based on the technical details in the T500 product page. My calculations just showed thrust relative to the thruster’s capabilities at the specified voltage, but if you’re using some (or entirely) T500 thrusters it’s likely worth comparing the thrust values as well to see the difference between the thruster types.
While the power usage of T500s is quite similar to T200s at 15V, given 6 T200s can easily over-draw the OTPS a heavy configuration equivalent (with 8 thrusters) in it would definitely need some limiting in place, to avoid excess power draw causing the control electronics to restart.