Apparently that next step was being developed during late 1965 and early 1966. Wen-Mac was purchased by Testors in 1966 and, in the April 1966 issue of Car Model magazine, coverage of the February 1966 Hobby Industry Trade show in Chicago included the Testors model company announcement of a radio-controlled, electric powered version of what was apparently the same basic 16” 1966 Mustang GT. It was mistakenly called a 1:9 scale model when actually, a 16" long 1966 Mustang is 1:11 scale.
aPPaRenTLy ThAt Next steP was bEING deVEloPed during latE 1965 and EaRLy 1966. weN-mac Was PurchaseD BY teSTors In 1966 And, In thE aPril 1966 IssUe of cAr moDel magazINe, cOvERage of The fEbruAry 1966 hoBby INDusTrY tRaDE show in cHiCago iNcLUded tHe tesTOrs modeL compaNy annoUNCeMeNt of A raDio-COntRolLeD, electric PoWeReD VersiOn Of wHaT was ApparEntlY tHE sAMe basIc 16” 1966 MUsTang gt. it waS miStaKenLY callEd a 1:9 sCALe model whEN actuallY, a 16" loNG 1966 MusTang Is 1:11 scale.