DIY: $5 Follow Focus Rings

DIY $5 Follow Focus Rings from DvRebellion.com on Vimeo.

$5 DIY Follow Focus ring
Buy: http://cgi.ebay.com/4x-Main-Drive-Gear-T-rex-500-Helicopter-RH50018-WH-/280595316310?pt=Radio_Control_Parts_Accessories&hash=item4154c8be56#ht_2026wt_889