the way I wanted to design my 518-618 valve body is to have no electronics, no shift solenoids for the shifting, I wanted 1 2 3 4 to be all off the manual valve, this way, there is no issues with delayed shifted with electronics, and no way a solenoid to go bad for shifting wile racing. To do this, I had to put Reverse and Neutral on the same detente, so my shift pattern is :

P
N-R (reverse when apply trans brake or reverse solenoid)
1
2
3
4

1st 2nd 3rd 4th are all off the manual valve, this makes for the best
flow and apply pressure. This can only be done when using N&R on the same detente. So you dont want a trans brake, I can set the valve body up so the solenoid only works in reverse, but we all know, if you have a valve body with a trans brake, you going to want to play with it and try it, they are a lot of fun at stop lights