Simon - yes, I can see what you're saying. If I were to do something like that then I would leave the legs long as I suggested, do all the jointing and leg shaping and the assemble the table dry, still with the legs overlong at each end. The top of the legs I would then scribe level with the table top and the bottom would be done the same way by putting the table on something flat (sheet of mdf) ensuring that by packing the legs from the underside that the top is equidistant from the mdf at each corner, then fix the scribing blade to a block of softwood and scribe the bottom of the legs so that the overall height of the legs is the one required...table is then dis-assembled and the top and bottom of the legs sawn off and then shot in with a block plane - Rob