Is it ok to transfer a spooled line to another reel? For example ... I mistakenly spooled a good line to a crappy reel and want to spool it to a better quality reel. Is it ok to do the transfer? Any bad side effect or defect to the line? Such as line twist ... ect ...

I've done it many times with no issue. Any time I spool up my reels, I always try to troll the line all the way out and reel it back in with a lot of tension. This helps with memory and line twist, but you don't necessarily have to do this to get good results. Tighten the drag of the "donor reel" pretty tight so there is tension for the transfer to the other reel and you should be fine.