The release notes for the Rev. E driver board say to change all your transistors (for quasi) to MJ21196. After looking those up, I see they are obsoleted. Mouser has the MJ21196G and I'm curious if these will be sufficient.
Here is the data:
http://www.mouser.com/Search/m_ProductDetail.aspx?ON-Semiconductor%2FMJ21196G%2F&qs=HVbQlW5zcXW9Hdwg53oKog%3D%3D
Here is the data:
http://www.mouser.com/Search/m_ProductDetail.aspx?ON-Semiconductor%2FMJ21196G%2F&qs=HVbQlW5zcXW9Hdwg53oKog%3D%3D