I suggest you make the changeover to TT01 type E parts.
Better uprights, stronger cassis ( less flex) and a lot less slope in the steering!
To modify your TT01 you will need:
2 x Tamiya TT01 Type E A-Parts Upright 51318
1 x Tamiya TT01 type E D-parts Upper Deck 51319
1 x Tamiya 3x15mm Screws 4pcs. 9805859
1 x Tamiya 3x8mm Tapping Screws 10pcs. 9805754
3 x Tamiya 3x12mm Tap Screws 4pcs. 9805629
1 x Tamiya 3x10mm Screws 10pcs. 9804159
1 x Tamiya 3x15mm Tapping Screws 10pcs. 50583
1 x Tamiya 2X10mm Cap Screws 2pcs. 9805632
1 x Tamiya 3x12mm Counter Screws 10pcs. 50581
1 x Tamiya steering post 2 pcs 9808016
1 x Tamiya 3x12mm screw (for steering post) 2pcs 9805684
There you have it, it should cost you around 35.00 to get a lot better chassis and steering for your TT01.
I made that conversion and it is great!
I liked it so much I bought a TT01R Type E .
And don't forget the manual for the TT01 Type E to figure out where the screws go, there are a lot of different lenghts.
here is the link for the manual
download the manual and have fun!!!!!!!!!!!!!!!!!!!!!!!!!!