For a Nitro TC3?????
Who would still be willing to bring one of those to a "sanctioned" race event when even a Mugen MTX3 or a Kyosho 2R is already obsolete? Anyone who has a Nitro TC3 is most definitely is planning on bashing and maybe running in a local parking lot club event where the rules are laxed.
Don't recommend $300++ Novas for a car the guy probably got off Ebay for about $100 or less. Get a grip.
If the OS .18TZ fits your budget then it is fine for your TC3. Just remember to use OS plugs.