finger joint jig

Hello this is my finger joint jig i have just made it took about 4 hours to build with various bits of ply i had kicking around. the inner box runs on two old drawer runners. and a piece of m10 threaded bar. the threaded bar is kept in place by two bearings which have been sunk halfway into the wood and kept in place by locknuts. on the end is a wooden crank with a bearing for a handle. the bootom has a runner made from ash. moves well in the saw bed. yet nice and light due to the pop ply. well when i finnished i just had to try it out. so the last picture is my first try. each time you make a cut. turn the crank four times and the results speak for themselves. ( normaly a five minute job looks like a five minute job). maybe it does look a bit rough but it produced a good joint. thanks for looking.