V6 Phaserunner 25% Field Weakening Limit?? Testing 72V BBSHD w/ Frankenrunner L10

Apparently the Phaserunner V6 has a 25% field weakening limit which is undocumented anywhere. Grin Tech support is completely unaware of it. The PR v6 is based on a BAC 855 controller. The 25% field weakening limit is applied by the V6 BAC firmware (software that runs on the controller). So Today i am using the Frankenrunner L10 controller which is running V5 BAC firmware, that does NOT have the 25% field weakening limit. I want to try 35% instead of 25%. I got going 46MPH instead of 42MPH, so the 10% field weakening makes a slight difference in the case of a 72V BBSHD it is quite common to run a higher field weakening amps, and this limitation of the V6 Phaserunner has been getting in my way. I am working with Grin Tech to see if there is a way to get around this 25% limit in the Phaserunner V6, it seems possible but ASI locks the controllers down to some extent. Depending on the help Grin is willing to provide it may be very simple, or quite complicated. I am waiting on an email from Grin which may or may not ever be responded to. If Grin Doesn't respond, I think I can brute force the access codes by sending modbus commands to the controller. but that would be a PITA / last resort scorched earth method.