I have had a number of things done over the years, including equipment upgrades - all superbly done. The 'sound-deadening' project is probably the most spectacular: I was unhappy with the sound system in my 4WD Hilux - we go on long camping trips and I wanted a better sound. Mark advised against getting a new sound system; rather, he recommended putting sound deadening into the cabin. What a difference - as I told him, he has turned the Hilux into a Bentley! Our 4WD service people cannot believe just how quiet the Hilux is, and have recommended the process to many other owners.