Before revision:  This brand-new technique is then used to transform the sojourn time of non-purging (n, k) fork-join queues into a linear combination of the sojourn times of basic (k, k) ~ (n, n) fork-join queues.
After revision:  This brand-new technique is then used to transform the sojourn time of non-purging (n, k) fork-join queues into a linear combination of the sojourn times of basic (k, k) , (k+1, k+1), ..., (n, n) fork-join queues.