Last week I decided to use my TT02 Type S at an asphalt track. I was too lazy to convert one my TRF421 for asphalt. I managed to get it become consistent by 3rd qauli, only to have a C hub break on me. It was literally the only part I could not find in my spares. So day ended. When I returned home, I noticed I had some 420 style arms, C hubs, uprights etc left over. The only thing that irritates me about these arms is the lack of droop hole. Qatmix, our esteemed friend has designed two carbon plates that can be attached to address this. I however figured I'd look for a more crude route. So I took the TB03 reversible arms:

1. Drilled out the droop screw hole with 3 mm bit
2. Tapped it with 4mm tap
3. Placed the 420 arm on top and screwed a long 4mm screw into both to secure.
4. Ensured arms are parallel and square to each other.
5. Drilled hole through opposite droop screw hole of TB03 onto 420 arm.

Now I have 420 arms compatible with the droop tabs of TT02 type S. Now if only Tamiya had done that for us would have been great.