The original 700's already have 4uF 150V bypass capacitors installed. (They were made by Mallory and were either brown or orange in color). They are located on the terminal strip between the positive and negative output stages. I don't recall Dean ever removing the 4uF caps and replacing them with .33uF film bypass caps or adding .33uF's to the 4uF caps to an original 700 series 1 amplifier in an effort to remove any oscillations after I installed newer faster output transistors like the MJ15024's, MJ21194's or MJ21196's. At that time, little else could be done to the series 1's other than to add (up to) 33pF "slow-down" capacitors.
SIDE NOTE: If my memory serves me correct........The addition of "slow-down" capacitors will more than likely also reduce the original bandwidth of the amplifier. Particularly in series 1 amplifiers. As an example, lets say a 700 series 1 had a bandwidth around 27KHz and 33pF "slow-down" capacitors are installed. The bandwidth will be reduced very close to 20KHz. Using any value greater will typically reduce the bandwidth below 20KHz. This is all with respect also to the amplifier being driven to rated output into a 8 ohm load and meeting the .25% T.H.D. specification.
Ed