Re: Tooling discussion for building interior doors
FS Tool have a set of cutters that work quite nicely for making doors and as others have stated Royce Ayr also do the same thing. I just took a look at your link. I don't think you will find anything at Royce or FS Tool in that price range. I would have no difficulty with either Amana or Infinity for quality. If you went with the ones in the link I would make a jig for drilling the rails and stiles for a large dowel, something in the 3/4 inch round and 6 in. long. It would reinforce the joint nicely. Over the years I have made 1 1/4 in. panel doors for bifolds using just the regular cutters w/o the dowels and they have lasted years.
" It is nice to be important but more important to be nice"