Hi does anyone out there have, or knows where I can get hold of a spare rear needle valve assembly that can fit on my OS40LA, I had one of those unfortunate landings where the ground arrived far quicker than I expected!! Yeah I crashed!! This landing completely demolished my black horse twister and snapped off the nipples on the needle valve. The valve assembly is the black plastic type which fastens to the rear of the engine with a metal bracket. Any help is most appreciated. Mark.