Good call. I did the same thing in a different way: 1 oz bourbon, 1 oz Averna, 1 oz apricot eau-de-vie, 1/2 oz lemon. Very nice. Then I had a little 50:50 Averna and apricot eau-de-vie. Very nice too. I really wish I had bought more Blume Marillen when I found it for only $18/375ml!
More success with this formula last night.1 oz bourbon, 2 oz Averna, 1 oz Obstler, 1/2 oz lemon juice. A bit on the big side, but very good. Bauer's Obstler is an Austrian 80 proof pot-distilled eau-de-vie with 70% apple and 30% pear. I found it in the NH state liquor store, thanks to my friend Ivars. It is quite affordable ($20-$25/liter). I think this drink template needs a new name and a prototype recipe. Its very good.
I'll keep an eye out for the Obstler- it sounds like something I would like. For now I improvised with a mix of apple brandy (I have clear creek) and pear eau-de-vie (I used clear creek but could try massenez next time). I agree, time for a new drink name/recipe- this is good stuff.