Speed up your mk 3 steering
It will of course make it heavier. I guess you could also use it to slow your steering and make it much lighter.

http://www.ebay.co.uk/itm/1-5-1-STEERIN ... 5d2e605364
http://www.ebay.co.uk/itm/New-1-5-1-Qui ... 2eb4e06733
http://www.ebay.co.uk/itm/1-5-1-STEERIN ... 5d2e605364
http://www.ebay.co.uk/itm/New-1-5-1-Qui ... 2eb4e06733