I don't think Bill D Lemonade is strong enough. It makes a great lemon trinity but I think you would need to use the trinity at least 6% (probably higher) in your lemonade mix to get enough lemon flavor. JMHO
I just (re?)added the lemon component to the Lemondowskii and noticed I in fact mixed it on May 21, not April 15, as I said yesterday (I had planned to mix it in April but lost my oomph before I got to it). I am comforted to know that I wasn't as remiss or forgetful as it originally seemed.
I'm vaping the revised version right now and still don't find it particularly lemony, but I suppose it's unfair to judge after only ten minutes. On va voir.
Lemondowskii is really good with .25% FA Lemon Zest added in. It is also great with Pippa's lemon trinity instead of the lemon in the original recipe. My Zing Remix as every bit as good as Lemondowskii and is actually quite lemony and zesty!