Don't worry about the 680 or 900 pF micas. Those are in the horizontal section, and have no effect on your vertical rolling problem.
There are quite a number of parts that can affect the vertical oscillator frequency with this design, including C62, C63, C65, C66, C67, R56, R57, and R59 (all on the Sams schematic available on the ETF website here:
http://www.earlytelevision.org/pdf/M...-Sams-83-6.pdf ).
If the vertical hold control is just out of range, the first thing to try is to adjust the value of R57. If the vertical hold control is closest to locking when it is turned to minimum resistance, then try substituting 1 M instead of 3.3M for R57. If it is best at maximum resistance, try substituting 5.6M instead of 3.3 M. Either of these simply have the effect of extending the range of your vertical hold control.
If that works to stop the rolling, then see if you can find what component is out of whack to cause the problem in the first place. Try replacing the micas in the list above, and confirming the values of the tubular caps you installed. Or, if it is working fine, just leave the altered value of R57 in place and be done with it.