Hey guys I'm looking for a 1 piece adapter for my Weber 38, it going on the stock manifold. So far i have found only this

http://www.lceperformance.com/Spiral...-p/1033028.htm

Anyone out there have experience with one of these? To me it looks as if the spiral adapter, and seal are made to fit the 32/36 judging by the different sizes of the openings. Can anyone tell me if this is true, and if it still works with the 38? Thanks!!