I need accurate measurements and dimensions to have barrel clamps made. we all are aware that there is an intergalactic backorder for the FX Crown, mine included. by sifting through the threads here I have found a reputable place to have them made, they are smwengeering.co.uk. they offer a sweet barrel clamp for the FX Wildcat and said all they need are accurate measurements in MMs. the dimensions they need are diameter of bottle, diameter of barrel assembly, gap between the two, center to center barrel/bottle. please include whether the measurements are for the previous model with the telescopic shroud or the newer model with the fixed shroud. ** edit (sorry), also what kind of tank you are using. alum., carbon fiber, fiberglass and volume, etc.