Yes, the second valve IS rotated 90 degrees regarding open valve path of travel relative to the other two...that allows the unique architecture shown...the "SWOOP". George's valve supplier will be tested mightily in interpreting correctly the register orientation and knuckle directions for this set...and keep in mind the second valve variance so that he doesn't doesn't this trick when done soldering and finds the thing awry. Very sharp of you to notice that detail. Scherzer's is more convenient...and straightforward. Mine, well in vintage British road-race car hot cam design parlance....'DIABOLICAL'. Just diabolical. And, I kind of like it spicy like that. I know there are a number of trumpet designs that touted "a straight-through air passage design when the valves are open" concept...I had several, one being the Buescher 205, others being the Olds Superstar...but when I think about it, yes, it is a straighter, cleaner passage when all the valves are OPEN..but when any one or more are NOT in the open position then you are back to convolution, but now there will be MORE CONTRAST built into the sound of your horn relative to the "open" or depressed valve positions, and I think THAT would be unfortunate...so...yes, there is NOT a "straight-through" shot in this and as long as some weird harmonic effect is not triggered it doesn't bother me at all.