Hello,
You can't fit a dado stack to your Startrite, so commercial box jigs (that I know of) won't work. You could make your own jig to work with a single blade, but it would need some sort of threaded advance mechanism, to move the work across by the finger width, but also allow for the blade thickness. You will also need a flat top ground circular saw blade. It can be done, but might be a bit of a project in itself to get it all working satisfactorily. There only needs to be a little inaccuracy and the joint will be too tight to fit, or too gappy, and run out.
I have an Incra iBox jig, which works well enough on a router table. It is quite good, but might be a little on the expensive side, if budget is tight. Don't get me wrong, they are worth the cost, but if you are only doing one of two boxes every now and then, perhaps a bit spendy. If you do have a router table, then you could make your own. I did one which worked a treat, and only got the iBox when I moved workshops and the homemade one got lost. I just fancied trying a commercial one to see how good they could be.
I can't see how a bandsaw one would work. You could cut the pins, but you would still have to chisel out the waste, and you would still have the advance mechanism to work out, with the blade allowance. It gets too complex, for something that doesn't do enough of the work.
Mike.
