Yea staggered splits are awesome, I'm currently designing my own PCB for a split staggered with less keys than the typical sofle et all. Similar to what Ben Vallack has built.
SAL is new to me - SA-ish, but not as high? (That's the impression I get from your picture).
And yes, still not 100% done with the layout of my Lily (are you ever), but certainly very glad I built it. Not sure I'm I'm ever ready for Vallack levels of key reduction, though...
Yea and r1-r4 are same angle/height as well (That's why the bs and esc are different profiles as they are r5. I really want something similar to MT3 WoBs but there isn't a set rn for double space bars, short enter and 1u backspace.
Yea Vallack is quite extreme. But I do like the concept, I'll see where I'll end up.