@3zworld You are welcome to call us here at the shop anytime Monday - Saturday 9am - 6pm PST. Our shop number is (909) 481-4300.
Just to help you guys out on what we do with the valve body and how it is different from the line pressure increase done in UpRev, here is our description from our website:
GTM Motorsports*::*AUTOMATIC TRANSMISSION*::*GTM Valvebody Upgrade for 7 speed A/T
We are proud to present the only high performance modified Valve Body Upgrade option for the Nissan/Infiniti RE710E 7 Speed Automatic Transmission.
After many months of development and testing on our own shop G37, we were able to dial in the modifications necessary to increase pressure to specific parts of the transmission to increase the holding power of the 7 speed transmission. Not only does the upgrade increase pressure, it also improves shift quality and response. The 4th to 5th shift now executes significantly faster and the lazy, delayed factory shift is eliminated.
We also perform modifications to every individual circuit to fine tune the oil volume so the applied pressure can be controlled more precisely. Also, the EPC Solenoid is modified to handle higher line pressure. The beauty of this modification is that nice, smooth shift points under low loads in fully automatic mode are left intact for comfortable driving around town, while the character of the transmission changes drastically in manual mode at higher loads for spirited driving.
Unlike TCM reprogramming that raises pressure across the board and ultimately in areas that don't need it, such as downshifting, pressure is only higher when it is called for.