Been thinking if you get a clear filter housing put a plastic divider in and put 2 bits of threaded rod on each side of the divider you will keep the hydrogen and oxygen secret if the divider dont go all way to the bottom as bubbles should just rise and you wont get so much in motor just brought the filter housing today going to give it a go going to some small rubber hose around the edge of the plastic divider for better seal think if works it will be about 5c l for gas fuck the ritch