Have any of you ever modified your Vandersteen 2C?

A friend has suggested modifying my '87 Vandy 2C's. He has had great success with re-wiring with Van Den Hul internal wire. He also suggests opening the midrange box to the rear and sides; and removing the back plate from the tweeter. This provides a similar sound to the Alons. He was adamant that the crossover should not be touched. Any comments?