Following instructions I found last summer on-line, I built a large and kludgy one of these. It works but is awkward, somewhat fragile and generally leaves a lot to be desired. The MagBeam Wildlife Kit is a vast improvement. It's extremely well-built and much smaller than my home-made version. It was quick to attach to a Godox TT685s and calibration (making certain the flash winds up concentrated in the middle of the exposure frame) took less than 30 seconds. January temperatures here rose to the mid 50s so I quickly headed to my shaded back yard and was very pleased with the 200mm, hand-held exposures I got during my very first session. Better still, the MagBeam cone holding the plastic fresnel lens is held to a collar that slides over the front of the Godox. It easily pops off for bag storage or will accommodate other MagMod light modifiers. I anticipate spending a good deal of rewarding time with the MagBeam.