George16 - are those going to fit in the stock 3905 diff cases, or are you going to need another set of cases - Tmaxx??
It won't fit the 3905 case so you have to buy another set of case .
Castle Neu 1520 on 6S LiPo Powered Gmaxx (Nitro Killer)
Predator with OS .21TM
Supermaxx with Mach .26
Revo with OS .18TZ
Kyosho ST-RR Conversion
Ofna CR with Tekin ESC/Motor (2)
I didn't think so - I run ofnas in my FLM E, SM, Pred and soon on my Lightning. A set of spares will be getting some new UE cases so I can run them on my old Tmaxx and not worry about diffs again (except for maintenance, lol).
Even with the cost of a set of cases, I think buying ofna diffs is a better deal all things considered.