tripxrcer... 3Ding does require more thrust.... And I'm sure the 91 4c
will give you a "lot" of thrust... But I think on the twist a Saito 72 or 82a
4c will work fine... and its a bit lighter, another great option for 3D... For
the UCD 46... The 91 4c would be great.. I just got UCD 46, but it's
powered with the YS63 4c... No flight time yet, But soon I'll be able to
see if it's enough... If not, it will be replaced with the Mag 91 4c..