Originally Posted by Turbonium
http://www.tamiyausa.com/product/rcp...tion=&offset=1
this is the page on Tamiya's website listing the hopups for the M03.... the TA03 diff is actually listed,as well as the Manta one there....
i think a lot of that is actually left up to the club running the regional events, but held to TCS rules, they would be out.
Tamiya rules do allow both of those diffs in TCS legal competition since they are listed as hop-ups for the M-chassis and all regionals and worlds allow them.