Yes exaclty, from these 73mm reflectors if you remove most of the “bezel” you end up with 67mm inner diameter. The inner head diameter is 128mm(4x 64mm possible), I dremeled out an extra 1.5mm from the inner diameter of the head and ended up with 131mm. I have to cut 2 sides from each reflector to get them to fit all together and also reduce their diameter to 65mm. In the end with tolerances mistakes etc I should end up with an inner diameter reflector set of 129-130mm. The original BLF GT94/GT4 (which I am trying to outperform) have an inner reflector diameter of 118-119mm so I am ok with it.