Don't use baby stays, that will tear out the tabernacle. I used to use a sliding fulcrum. I built it out of a SS boom gooseneck slide from dwyer, two eight foot aluminum conduit poles flattened a drilled at each end and two sliding cars mounted on my genoa tracks. I also bolted an eye in the mast groove at the base of the mast about 3" up from the bottom.
I would lower the sail below the gate, insert the slide, bolt one end on each pole through the eye and the other ends to the cars. This makes a pretty good truss. I also attached a block to the tabernacle through which a line led from the slide eye through the mast base eye and then to my port winch. also I had a lever type disconnect on the forestay. To lower the mast to the correct height, I made fast the fulcrum by taking slack at the winch, released the forestay, then slowly allowed the slide to travel up the mast groove, causing the mast to lay aft to the desired point, then made fast the line. To raise the mast back to full up position, I just winched her back up, pulling the slide and the fulcrum back down the groove, and reattached the forestay. The tension on the slide line at the base of the mast kept the mast from levering the tabernacle out of the deck
One thing though, you must have a roller reefing gooseneck on your 19 and set the boom 90^ from normal or the boom won't swing far enough up towards the mast to attain a 15" mast height.
Dwyer will make you an extended gooseneck long enough to swing the boom right up against the mast if you want.
I don't have any pictures of this rig, and because my boat camps out at my dock, I don't use it often. I built it to go under a 14' bridge. If I was trailer sailing a lot it would be my one armed mast raising rig.