I am maintaining my target weight, and often use EE with no extras - I was a 'very slow loser' so did my weight loss using red and green, and the easy plan for me is the equivalent of an extra HE choice (As i would use my B's on the meat or carbs, rarely bread or cereals etc), so I can maintain on Easy without tweaking it.
If you are losing very very slowly on easy by cutting down syns, you may find that to maintain on easy, you just keep doing it the same, but bring your syns back up to 10 - 15. Adding an extra HE may gain for you. I lost my last few pounds using Sucess Express.
The whole thing with maintaining is that how you achieve it is different for everyone. Once I got there, it took me a couple of months to get the hang of it and start to feel comfortable within the range.
good luck though - you are nearly there!