After years of listening to many waxing lyrical about the King Duo Gravis Bass Trombone I've finally managed to buy one. Straight out of the box I lifted it up and was surprised how light and small it felt. It came in the original case which too felt Tenor like. The bell was a standard size 9 1/2 inches and the bore slightly smaller than that of the more modern troms. Once I put my 1G mp in and adjusted my grip to compensate for the strange dual valves operated by one thumb arrangement wow was I surprised. The tone was "old fashioned" in the sense that it was a little edgy when pushed and the lower range was awesome, enough to easily rival my R9. For the past two weeks the duo gravis has been my first choice as I've found it easier to maintain (no constant hagmann lubing) and even easier to acquire the noise I want to make than the other bones I have in the closet. All in all I'm really impressed, the only slight downer being the revised grip required to operate the valves although I realise this can be changed to the more traditional thumb and "Saturday night finger" arrangement. Has anyone else any Duo Gravis experiences they want to share?