RE: O.S. .18 CV-RX w/11J Rotary Carb vs. Nx18
Bearing quality.. I have 3 OS 18 cvrx's and never had a single issue with any one of them... especially the bearings... even the one ways are original and never even cleaned... several gallons thru all of them... as for the NT18... good engine for what it is but doesn't have the power of the OS and tuning is more difficult.. I have 2 of the OS engines in my cen mt's and the other is in a Kyosho Touring car....The cen engines are looking for a good home....
The OS 18CVRX is a very popular upgrade for the Magnum and MT2 for a reason... They work great... they are also very inexpensive....