Yeah.ive used a homemade swivel filter since they first came out without any issues...i used a 6inch stop end drainage adaptor which fits inside of the rim of the lamp,cut out the whole middle and cut about 5 mill off the outside of the adaptor ti give it a tight fit.you can either spray the adotor black or just use black tape which I do to keep the beam right.once this is done the filter needs two of the prongs cutting of and the remaining prong needs heating up and bending over to which you can use as an up and down swivel.then you screw the filter onto the rim of the adaptor and thats it.