Before revision:  When insertions and deletions are considered, we achieve a packing density of (1-\epsilon) of the optimal , where \epsilon>0 can be made arbitrarily small, with an amortised reallocation cost of O(c(1+s^2)1+s^2\frac{1}{c} + c\frac{1}{\epsilon}).
After revision:  When insertions and deletions are considered, we achieve a packing density of (1-\epsilon) of the critical density , where \epsilon>0 can be made arbitrarily small, with an amortised reallocation cost of O(c(1+s^2)1+s^2\frac{1}{c} + c\frac{1}{\epsilon}).