The A3 cam does crack one valve and open the other at low rpm, then operate both valves in a `normal' fashion when the vtec system is engaged. The A2 operates in a more traditional performance oriented sense but at low rpm the two pairs of valves do not operate identically. The intake valves are staggered to induce swirl in the cylinder, while the exhaust valves are also staggered to improve exhaust pulse scavenging. Honda wouldn't engineer this complication without purpose. However all Vtec killer arrangements nullify this system. Reports on low rpm drivability with vtec killer systems are varied, and most are race only type arrangements. A Vtec elimination using the stock Honda high rpm lobe, which I believe is what Derek has done here, is a to my knowledge a first. Most systems run different specifications. Here's to breaking new ground!
Correct me if I'm wrong on any point, its been a while since I've been inside a Honda head.
Great work Derek, looking forward to seeing cams in this head!