Just though i'd share this with you, I made it last year I think for the K4 Electronic' groups.
Got to make another one but I'll swapout the hardboard with MDF this time, as that was horribble stuff to cut and left crud all over the rails and surface of the laser bed.
Using two LS3060's and an ex 3020 user Please note I am not employed by HPC, any advice or recomendations I give are based on my own experience and are not necessarily the same as HPC's. First point of contact on any hardware issues should be with HPC