Another tip using the t-Bird filler. I apply one spray coat of T-Bird epoxy before applying the filler. Otherwise some of the color of the riser wood can "bleed" on to the lighter wood in the lams when applying the filler. This is particularly true with oily woods like cocobolo. For most woods, I use 1 coat of epoxy, 3 coats of filler, sand, and then 3 coats of epoxy. Some woods like Wenge require more filler.