  This paper adds some details to the seminal approach to logarithmic formality
\cite{AWRT} and interpolation formality \cite{WR} by Alekseev, Rossi, Torossian
and Willwacher: We prove that the interpolation family of Kontsevich formality
maps extends to Shoikhet-Tsygan formality and a complex interpolation
parameter. We show some elementary relations satisfied by this polynomials. We
also compute some Kontsevich integral weights and reason on the number
theoretic meaning of the invariance of Kontsevich's propagator under real
translations and scalings in the case of the Merkulov $n$-wheels.
