I'm running the b5 front arms and tower with brass inserts to raise front axle height.

The 4 gear is in there because I sold my 3 gear to make a deal happen on another b5m and I was planning buy the 3 gear lay down but then I'd need a new body and it's just not cost effective when the b6 is pre ordered.

I expect the b6 to be race ready... Which would surprise me with plastic hubs, but we'll see.