And don't forget to ask your dealer about the cost of re-tip if your bought your MC cartridge instead of some nice MM. With Sumiko ELLIPTICAL tip you can use only for about 600 hrs at recommended tracking force, then it must be inspected and after 600 hrs mark you will have to re-tip it soon.
This Sumiko is extremely fragile, the cantilever can be easily destroyed simply because it is not protected at all. A bit strange that you worried about alignment (probably because of possible damage), but purchased the most dangerous cartridge. Like Lyra, VdH and
Dynavector with unprotected cantilever , your Sumiko require extreme care in operation. Personally i always trying to avoid such cartridges, because after i accidentally destroyed one expensive MC i realized the cost of repair (if ever ever possible).
When you reported us that your phono preamp has only MM input i assume your Sumiko is HOMC (High Output MC), right ? A high output MC is always inferior in comparison to the Low Output MC, mainly because of more coil wire winding that cause higher moving mass.
Of course the most important is your own opinion about cartridge and the sound quality.