hi guys! i'm thinking of getting another engine for my 1/10, the Sirio S12-TUP in particular. But i heard that there are actually 2 versions, one is the standard 5 port while the other one is a 5 port factory modified (or something like that!) both have the same part numbers. Btw, they are priced at S$295 & S$380 respectively. can anyone confirm?