Hey guys!!m Great insight on the Quark!! I am presently using a 125 on 4S in a TC4 with zero problems and I am extremely pleased!!! I am setting up a Inferno GT to do 6S with a Neu 1512, either a 2D or 2.5D on the 80. This is going to be a high speed car just for 10-15 passes. Opinions??