Came across something I had not seen before: Smooth Ambler, retailer private bottling, 7yo, cask strength 121 proof. I was under the impression they had limited quantities at present while aging some of their own production. I suppose there has been enough acquired to release some cask strength barrels. Anyhow, at $37, couldn't walk out without some. Even with unknown sources, a barrel strength > 120 proof at less than half the cost of a BTAC high proofer is a no-brainer for me.