Maybe it's a good thing it's a test drive Widow. Sounds like you've been shooting 3 under for a while, and know how to bare shaft tune. I've tuned Widows and other bows for 3 under, some of which were made for 3 under and some of which were not. I'm happy if I can get the bare shaft to fly straight with the nock point somewhere between 5/8" and 3/4". For maybe 7 out of 8 bows, I can achieve that, whether the bows were made for 3 under or not. There is the occasional bow that just won't tune for me for 3 under, and all I can say is, there are a lot of other bows out there, Widows and otherwise, that will tune just fine for 3 under. I would imagine that if you wanted them to, the folks at Widow could re-tiller the bow to shoot 3 under. Of course, then you would be obligated to buy the bow, I would think. If you decide to go that route, you should ask them how much weight would be lost, if any, in the re-tillering process.