Hi Miles any of the jigs posted will do the job the below pictures are my effort. The first thing you need is a hardwood runner to go into the mitre slot which needs to be cut snuggly so you have no movement from side to side but not too tight to move in and out the height needs to be to the top of the table surface or just below. Once you have your fence set to to the width you require for the runner you may as well cut 4 or 5 of them as you will probably want to make more jigs. This one is one of 5 :-
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Next you will need a piece of MDF or plywood 12mm or above I used 18mm cut the plywood deep enough to get a 45 deg angle block attached or what ever angle you require and wide enough so it initially fits between the right hand side of the table and the other side of the saw blade. Then either mark where the runner is going to be place the runner in the mitre slot put some glue on it and lay the plywood on top and allow the glue to take a grip and drill and screw the runner once this is done sand the botton so it is reasonably smooth and give it a couple of coats of paste wax this will help the jig run smoothly :-
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Cut a piece of wood longer than a pen blank and about 20mm square cut a 45 deg ange on one end and line it up with the left edge of your ply then glue and screw it cut an other piece a bit shorter this is used as your stop. Once you set your stop you will need some means of holding it there I use a cheap toggle clamp. the thing on the top left of the jig is a stop I made this fits in the other end of the mitre slot and is held by a clamp this stops the jig sliding too far and me stupidly cutting right through my pen blank. The blank to be cut is held under the 45 deg block and against the stop. Hope this helps:-
