This paper sketches the toy-model of a new quantum General relativity (QGR) (aka “loop quantum gravity” [LQG]) variant mainly based on the redefinition of leptons (as quantum micro black holes [mbhs] composed from highly compressed single triquarks under a very strong quantum gravitational field [QGF]), a dual electro-gravitational interpretation of the (running) fine structure constant (FSC) and a reinterpretation of Planck units partially compatible with Einstein’s GR (EGR) (or in the “spirit” of EGR!). QGR is born at the bridge between EGR, quantum field theory (QFT) and M-theory (MT): that is why QGR can be regarded as a “synapse” which interconnects these three apparently incompatible theories (EGR, QFT and MT). This QGR variant can be considered a specific MT subtype based on cylindrical 4D branes (called “vacuum tubes” in this paper) with 3D hyper-surfaces (3D branes): this MT subtype may act like a "patch"/”needle” “sticking”/“stitching” together both EGR and QFT. This paper actually continues (from alternative angles of view!) the work of other past articles/preprints of the same author.