I purchased the Syren Serve-O-Matic to serve my ship model ropes. But I found it to be little "clunky". The gears didn't mesh very smoothly and I didn't particularly like spinning it by finger. So...I took their design and beefed it up by adding bearings and metal gears, along with some collars. I added a little turning handle to facilitate the motion. I stuck with their basic design. I only had to buy gears, tubing, bearings and collars.