good day all

im building my 2015 caad 10 bb30 / 68mm shell width

would like to share my case and see if you guys has any input

i had purchased a bb from c-bear product code pf42-30-r to act like a " pressfit " bottom bracket with internal cups to prevent the irritating creaks. its something i want to explore and so C-bear claimed it will aid to prevent creak.

i had purchased an used hollowgram Si spidering crankset with 175mm crank-arm taken off a bb30a bike and it came with a 109mm spindle.

as the 175mm crank arm will seems too long for my inseam, i also purchased a 172.5mm hollowgram SL crank arm that came with 104mm shoulder spindle.

i guess theres probably two ways to do it

method A - use the 109mm spindle + 172.5mm SL crank arm with 7.5mm spacer on the NDS ( apart from the 2.5mm on the DS + 1-3 x 0.5mm shims + wavy spacer on the NDS )
method B - use the 104mm spindle + 172.5mm SL crank arm with no additional spacer ( usual 1-3 x 0.5mm shims + wavy spacer on the DS )

so my questions would be

1) which model crankset / crank arm actually had the geometry changed on the NDS crank arm ( assuming Si and sisl2 onwards ? )
2) with method A - i probably will get a decent chain line but not on the Q factor
3) with method B - i probably will get a decent chain line and Q factor ? since the SL crank arms is meant for the 104mm spindle and 68mm bb shell width ?

Thanks for looking !