I have a 58" Silvertip takedown, and discussed with Dave before buying it whether it would work with my 28" draw. It was one of the off the rack bows they offer from time to time, although not lately; at present, I think he's plenty busy making bows to order. I probably would never have ordered a 58" custom bow, as that's a little shorter than I usually like, but it was beautiful, as all their bows are, and Dave said it would work fine with my 28" draw, but probably not with any longer draw length than that. It does work fine with my 28" draw, and I've taken it on several hunts.
I would never order a shorter one than my 58" with the same riser design for a 28" draw. I know it is possible to design a shorter bow that will pull smoothly to 28" with a shorter riser that allows proportionately longer working limbs. The Robertson Wolfer is an example of this, and I'm sure there are many others. The Wolfer is a 58" bow, but it is rated to draw to 30" I believe, due to the short riser and relatively long working limbs.
That said, I would discuss it with Dave and would believe whatever he tells me. After all, it's his reputation on the line, not ours.