u/DungeonFlounder

I’ve been looking to run some L5R, probably in a pbp format. I have a lot of 1st edition stuff, and really enjoy reading it. I have read that 4th edition is the most polished version of the roll and keep system, so was leaning towards using those rules. Is there any pitfalls to this plan I should be aware of? Any mechanic in 1st that would not be reflected in 4th? Thank you!