In a later Riders there was a whole page of revisions to these chassis, and it seems they changed the value of the focus control in later versions. But it's been a while since I read about it. Doesn't the Sams also have a couple notes about optional part values in the parts list? I'll see if I can dig up the Riders info.
[edit] Would probably be wise to pm Mr(Admiral)BandersenTV.
