Pretty sure that basically you will have more pitch one way or the other + or - and it will effect cyclic pitch to some degree.. Best to try and trim it out to get them at 90 either in your FBL unit or even your radio.. Depends on your flying style, sure you can fly it like that , but if your inverted as much as your upright it will tend to need more input to make all things feel equal. It's not a show stopper however.. if your not fussy, you can just fly it

Thats the basics of it..

 

Sorry I forgott the picture. I noticed 0.3 degrees difference on the blades when they should be zero both. Im not fussy and not flying show 3d on high precision levels..

 

It will be ok.... Just fly

 

so my babys are ready for the season. Finaly! We have 20 degrees and sunny weather in europe from Friday. Yeah.

 

It's good practise to do everything the right way first. You will notice the diference.
But as @The Dude says. if your not fussed then just fly it.