On a 1x system you should have a different chainline. Your front chainring basically sits between the large and small ring on a 2x. So my 44-11 should cross chain less than your 42-11 on a 1x setup.
I too am looking at the Sun xcd cranks, like the fact you can get a 110/74 BCD spider for them, TA rings in black with the shiny cranks, lovely!
Bike's looking fantastic, the WW bag is rather nice too.
Yes I saw that but apparently these spiders are for triples. To run them 2x you would need to mount the 110mm ring on the middle position and have specific spacers for the 74mm ring.
I don't like the look of it so I'll go with 50.4 rings.
On a 1x system you should have a different chainline. Your front chainring basically sits between the large and small ring on a 2x. So my 44-11 should cross chain less than your 42-11 on a 1x setup.