My 4.5 month old DS is 90th percentile for length and weight and I'm wondering if he's getting too big for his Arms Reach Mini Co-Sleeper. The weight limit on the co-sleeper is 35 lbs and, at 19 lbs, he's nowhere near that, but I have to be careful when I put him down that he has room on all sides. He's been waking up a lot at night lately and I'm wondering if it's because he brushes up against the sides of the co-sleeper and wakes himself up. Any one have ideas or similar experiences?